Substitute \( u=1+9x.\) Then, \( du=9dx.\) When \( x=0\), then \( u=1\), and when \( x=1\), then \( u=10\). Calculate the arc length of the graph of \( f(x)\) over the interval \( [0,]\). Surface area is the total area of the outer layer of an object. The calculator takes the curve equation. I use the gradient function to calculate the derivatives., It produces a different (and in my opinion more accurate) estimate of the derivative than diff (that by definition also results in a vector that is one element shorter than the original), while the length of the gradient result is the same as the original. How do you find the arc length of the curve #f(x)=2(x-1)^(3/2)# over the interval [1,5]? Cloudflare monitors for these errors and automatically investigates the cause. Round the answer to three decimal places. \nonumber \]. If the curve is parameterized by two functions x and y. Let \(f(x)\) be a nonnegative smooth function over the interval \([a,b]\). First, divide and multiply yi by xi: Now, as n approaches infinity (as wehead towards an infinite number of slices, and each slice gets smaller) we get: We now have an integral and we write dx to mean the x slices are approaching zero in width (likewise for dy): And dy/dx is the derivative of the function f(x), which can also be written f(x): And now suddenly we are in a much better place, we don't need to add up lots of slices, we can calculate an exact answer (if we can solve the differential and integral). What is the arclength of #f(x)=x^2e^(1/x)# on #x in [1,2]#? We have \( g(y)=(1/3)y^3\), so \( g(y)=y^2\) and \( (g(y))^2=y^4\). What is the arc length of #f(x)=x^2/(4-x^2) # on #x in [-1,1]#? We begin by calculating the arc length of curves defined as functions of \( x\), then we examine the same process for curves defined as functions of \( y\). There is an issue between Cloudflare's cache and your origin web server. f ( x). How do you find the arc length of the curve #y = 2-3x# from [-2, 1]? How do you find the arc length of the curve #y=lnx# from [1,5]? Determine the length of a curve, \(y=f(x)\), between two points. What is the arc length of #f(x)= sqrt(x-1) # on #x in [1,2] #? In some cases, we may have to use a computer or calculator to approximate the value of the integral. Many real-world applications involve arc length. The basic point here is a formula obtained by using the ideas of In mathematics, the polar coordinate system is a two-dimensional coordinate system and has a reference point. Imagine we want to find the length of a curve between two points. In this section, we use definite integrals to find the arc length of a curve. How do you find the arc length of the curve #y = sqrt( 2 x^2 )#, #0 x 1#? We'll do this by dividing the interval up into \(n\) equal subintervals each of width \(\Delta x\) and we'll denote the point on the curve at each point by P i. A hanging cable forms a curve called a catenary: Larger values of a have less sag in the middle If a rocket is launched along a parabolic path, we might want to know how far the rocket travels. What is the arc length of #f(x)=xsqrt(x^2-1) # on #x in [3,4] #? What is the arc length of #f(x)=2/x^4-1/(x^3+7)^6# on #x in [3,oo]#? \nonumber \]. Note: Set z (t) = 0 if the curve is only 2 dimensional. We study some techniques for integration in Introduction to Techniques of Integration. Our team of teachers is here to help you with whatever you need. How do you find the length of the curve for #y= ln(1-x)# for (0, 1/2)? For \( i=0,1,2,,n\), let \( P={x_i}\) be a regular partition of \( [a,b]\). Finds the length of a curve. \nonumber \], Adding up the lengths of all the line segments, we get, \[\text{Arc Length} \sum_{i=1}^n\sqrt{1+[f(x^_i)]^2}x.\nonumber \], This is a Riemann sum. How do you find the arc length of the curve #f(x)=coshx# over the interval [0, 1]? \nonumber \], Now, by the Mean Value Theorem, there is a point \( x^_i[x_{i1},x_i]\) such that \( f(x^_i)=(y_i)/(x)\). What is the arclength of #f(x)=x-sqrt(x+3)# on #x in [1,3]#? As with arc length, we can conduct a similar development for functions of \(y\) to get a formula for the surface area of surfaces of revolution about the \(y-axis\). What is the arc length of #f(x)= 1/x # on #x in [1,2] #? What is the arc length of #f(x)=lnx # in the interval #[1,5]#? Taking the limit as \( n,\) we have, \[\begin{align*} \text{Arc Length} &=\lim_{n}\sum_{i=1}^n\sqrt{1+[f(x^_i)]^2}x \\[4pt] &=^b_a\sqrt{1+[f(x)]^2}dx.\end{align*}\]. \[ \dfrac{}{6}(5\sqrt{5}3\sqrt{3})3.133 \nonumber \]. What is the arclength of #f(x)=(1-3x)/(1+e^x)# on #x in [-1,0]#? Check out our new service! calculus: the length of the graph of $y=f(x)$ from $x=a$ to $x=b$ is example Arc Length of 3D Parametric Curve Calculator Online Math24.proMath24.pro Arithmetic Add Subtract Multiply Divide Multiple Operations Prime Factorization Elementary Math Simplification Expansion Factorization Completing the Square Partial Fractions Polynomial Long Division Plotting 2D Plot 3D Plot Polar Plot 2D Parametric Plot 3D Parametric Plot There is an unknown connection issue between Cloudflare and the origin web server. Let \(f(x)=(4/3)x^{3/2}\). When \( y=0, u=1\), and when \( y=2, u=17.\) Then, \[\begin{align*} \dfrac{2}{3}^2_0(y^3\sqrt{1+y^4})dy &=\dfrac{2}{3}^{17}_1\dfrac{1}{4}\sqrt{u}du \\[4pt] &=\dfrac{}{6}[\dfrac{2}{3}u^{3/2}]^{17}_1=\dfrac{}{9}[(17)^{3/2}1]24.118. lines connecting successive points on the curve, using the Pythagorean Or, if a curve on a map represents a road, we might want to know how far we have to drive to reach our destination. How do you find the arc length of the curve #y=1+6x^(3/2)# over the interval [0, 1]? How do you find the length of the curve #y=sqrtx-1/3xsqrtx# from x=0 to x=1? These bands are actually pieces of cones (think of an ice cream cone with the pointy end cut off). The arc length of a curve can be calculated using a definite integral. Here, we require \( f(x)\) to be differentiable, and furthermore we require its derivative, \( f(x),\) to be continuous. We can find the arc length to be 1261 240 by the integral L = 2 1 1 + ( dy dx)2 dx Let us look at some details. We define the arc length function as, s(t) = t 0 r (u) du s ( t) = 0 t r ( u) d u. And the diagonal across a unit square really is the square root of 2, right? Land survey - transition curve length. What is the arc length of #f(x)=-xln(1/x)-xlnx# on #x in [3,5]#? Both \(x^_i\) and x^{**}_i\) are in the interval \([x_{i1},x_i]\), so it makes sense that as \(n\), both \(x^_i\) and \(x^{**}_i\) approach \(x\) Those of you who are interested in the details should consult an advanced calculus text. What is the difference between chord length and arc length? Then the length of the line segment is given by, \[ x\sqrt{1+[f(x^_i)]^2}. 148.72.209.19 The curve length can be of various types like Explicit, Parameterized, Polar, or Vector curve. What is the arclength between two points on a curve? How do you find the length of the cardioid #r=1+sin(theta)#? What is the arclength of #f(x)=(x-2)/(x^2-x-2)# on #x in [1,2]#? Disable your Adblocker and refresh your web page , Related Calculators: Please include the Ray ID (which is at the bottom of this error page). The curve is symmetrical, so it is easier to work on just half of the catenary, from the center to an end at "b": Use the identity 1 + sinh2(x/a) = cosh2(x/a): Now, remembering the symmetry, let's go from b to +b: In our specific case a=5 and the 6m span goes from 3 to +3, S = 25 sinh(3/5) To embed this widget in a post, install the Wolfram|Alpha Widget Shortcode Plugin and copy and paste the shortcode above into the HTML source. What is the arclength of #f(x)=xsin3x# on #x in [3,4]#? What is the arc length of #f(x)=2-3x# on #x in [-2,1]#? Let us now If an input is given then it can easily show the result for the given number. How do you find the lengths of the curve #8x=2y^4+y^-2# for #1<=y<=2#? Functions like this, which have continuous derivatives, are called smooth. The arc length is first approximated using line segments, which generates a Riemann sum. To help us find the length of each line segment, we look at the change in vertical distance as well as the change in horizontal distance over each interval. How do you find the lengths of the curve #x=(y^4+3)/(6y)# for #3<=y<=8#? What is the arclength of #f(x)=x^3-xe^x# on #x in [-1,0]#? Performance & security by Cloudflare. 1. \end{align*}\]. Your IP: We can find the arc length to be #1261/240# by the integral How do you find the arc length of the curve #y=e^(3x)# over the interval [0,1]? in the x,y plane pr in the cartesian plane. Round the answer to three decimal places. Let \(f(x)=(4/3)x^{3/2}\). What is the arclength of #f(x)=1/sqrt((x-1)(2x+2))# on #x in [6,7]#? For objects such as cubes or bricks, the surface area of the object is the sum of the areas of all of its faces. What is the arc length of #f(x)=xlnx # in the interval #[1,e^2]#? Then, that expression is plugged into the arc length formula. What is the arclength of #f(x)=x^2/(4-x^2)^(1/3) # in the interval #[0,1]#? So the arc length between 2 and 3 is 1. The LibreTexts libraries arePowered by NICE CXone Expertand are supported by the Department of Education Open Textbook Pilot Project, the UC Davis Office of the Provost, the UC Davis Library, the California State University Affordable Learning Solutions Program, and Merlot. We can think of arc length as the distance you would travel if you were walking along the path of the curve. Thus, \[ \begin{align*} \text{Arc Length} &=^1_0\sqrt{1+9x}dx \\[4pt] =\dfrac{1}{9}^1_0\sqrt{1+9x}9dx \\[4pt] &= \dfrac{1}{9}^{10}_1\sqrt{u}du \\[4pt] &=\dfrac{1}{9}\dfrac{2}{3}u^{3/2}^{10}_1 =\dfrac{2}{27}[10\sqrt{10}1] \\[4pt] &2.268units. What is the arc length of #f(x)=1/x-1/(x-4)# on #x in [5,oo]#? Because we have used a regular partition, the change in horizontal distance over each interval is given by \( x\). The concepts we used to find the arc length of a curve can be extended to find the surface area of a surface of revolution. We start by using line segments to approximate the curve, as we did earlier in this section. How do you find the distance travelled from t=0 to t=3 by a particle whose motion is given by the parametric equations #x=5t^2, y=t^3#? Embed this widget . How do you find the lengths of the curve #y=(x-1)^(2/3)# for #1<=x<=9#? TL;DR (Too Long; Didn't Read) Remember that pi equals 3.14. Example 2 Determine the arc length function for r (t) = 2t,3sin(2t),3cos . The integrals generated by both the arc length and surface area formulas are often difficult to evaluate. Let \( f(x)\) be a smooth function over the interval \([a,b]\). a = time rate in centimetres per second. What is the arclength of #f(x)=(1-x^(2/3))^(3/2) # in the interval #[0,1]#? And "cosh" is the hyperbolic cosine function. We know the lateral surface area of a cone is given by, \[\text{Lateral Surface Area } =rs, \nonumber \]. What is the arc length of #f(x)=secx*tanx # in the interval #[0,pi/4]#? How do you find the arc length of the curve #y = 4 ln((x/4)^(2) - 1)# from [7,8]? Arc Length \( =^b_a\sqrt{1+[f(x)]^2}dx\), Arc Length \( =^d_c\sqrt{1+[g(y)]^2}dy\), Surface Area \( =^b_a(2f(x)\sqrt{1+(f(x))^2})dx\). \[ \dfrac{1}{6}(5\sqrt{5}1)1.697 \nonumber \]. What is the arclength of #f(x)=(x-2)/(x^2+3)# on #x in [-1,0]#? These findings are summarized in the following theorem. What is the arc length of #f(x)=2x-1# on #x in [0,3]#? What is the arclength of #f(x)=(x-3)e^x-xln(x/2)# on #x in [2,3]#? The Length of Curve Calculator finds the arc length of the curve of the given interval. \nonumber \]. And the curve is smooth (the derivative is continuous). Save time. What is the arc length of #f(x)=x^2-3x+sqrtx# on #x in [1,4]#? It can be found by #L=int_0^4sqrt{1+(frac{dx}{dy})^2}dy#. To help support the investigation, you can pull the corresponding error log from your web server and submit it our support team. How do you find the length of the curve #y=lnabs(secx)# from #0<=x<=pi/4#? However, for calculating arc length we have a more stringent requirement for \( f(x)\). Then, \(f(x)=1/(2\sqrt{x})\) and \((f(x))^2=1/(4x).\) Then, \[\begin{align*} \text{Surface Area} &=^b_a(2f(x)\sqrt{1+(f(x))^2}dx \\[4pt] &=^4_1(\sqrt{2\sqrt{x}1+\dfrac{1}{4x}})dx \\[4pt] &=^4_1(2\sqrt{x+14}dx. 3How do you find the lengths of the curve #y=2/3(x+2)^(3/2)# for #0<=x<=3#? Let \(r_1\) and \(r_2\) be the radii of the wide end and the narrow end of the frustum, respectively, and let \(l\) be the slant height of the frustum as shown in the following figure. The formula for calculating the length of a curve is given below: L = a b 1 + ( d y d x) 2 d x How to Find the Length of the Curve? What is the arc length of #f(x) = x^2e^(3-x^2) # on #x in [ 2,3] #? Let \( f(x)=x^2\). What is the arclength of #f(x)=x^2e^x-xe^(x^2) # in the interval #[0,1]#? We want to calculate the length of the curve from the point \( (a,f(a))\) to the point \( (b,f(b))\). The Length of Curve Calculator finds the arc length of the curve of the given interval. Legal. What is the arc length of #f(x)=sqrt(4-x^2) # on #x in [-2,2]#? If you're looking for support from expert teachers, you've come to the right place. Inputs the parametric equations of a curve, and outputs the length of the curve. imit of the t from the limit a to b, , the polar coordinate system is a two-dimensional coordinate system and has a reference point. Then the arc length of the portion of the graph of \( f(x)\) from the point \( (a,f(a))\) to the point \( (b,f(b))\) is given by, \[\text{Arc Length}=^b_a\sqrt{1+[f(x)]^2}\,dx. \[ \dfrac{1}{6}(5\sqrt{5}1)1.697 \nonumber \]. Added Mar 7, 2012 by seanrk1994 in Mathematics. What is the arclength of #f(x)=x^3-e^x# on #x in [-1,0]#? Find the surface area of the surface generated by revolving the graph of \(f(x)\) around the \(x\)-axis. We have \( f(x)=2x,\) so \( [f(x)]^2=4x^2.\) Then the arc length is given by, \[\begin{align*} \text{Arc Length} &=^b_a\sqrt{1+[f(x)]^2}\,dx \\[4pt] &=^3_1\sqrt{1+4x^2}\,dx. The formula of arbitrary gradient is L = hv/a (meters) Where, v = speed/velocity of vehicle (m/sec) h = amount of superelevation. It is important to note that this formula only works for regular polygons; finding the area of an irregular polygon (a polygon with sides and angles of varying lengths and measurements) requires a different approach. How do you find the distance travelled from #0<=t<=1# by an object whose motion is #x=e^tcost, y=e^tsint#? Thus, \[ \begin{align*} \text{Arc Length} &=^1_0\sqrt{1+9x}dx \\[4pt] =\dfrac{1}{9}^1_0\sqrt{1+9x}9dx \\[4pt] &= \dfrac{1}{9}^{10}_1\sqrt{u}du \\[4pt] &=\dfrac{1}{9}\dfrac{2}{3}u^{3/2}^{10}_1 =\dfrac{2}{27}[10\sqrt{10}1] \\[4pt] &2.268units. How do you find the length of the curve for #y=x^2# for (0, 3)? How do you find the arc length of the curve #y= ln(sin(x)+2)# over the interval [1,5]? Determine the length of a curve, \(x=g(y)\), between two points. $$ L = \int_a^b \sqrt{\left(x\left(t\right)\right)^2+ \left(y\left(t\right)\right)^2 + \left(z\left(t\right)\right)^2}dt $$. Then, the surface area of the surface of revolution formed by revolving the graph of \(f(x)\) around the x-axis is given by, \[\text{Surface Area}=^b_a(2f(x)\sqrt{1+(f(x))^2})dx \nonumber \], Similarly, let \(g(y)\) be a nonnegative smooth function over the interval \([c,d]\). What is the arc length of #f(x)= xsqrt(x^3-x+2) # on #x in [1,2] #? segment from (0,8,4) to (6,7,7)? The figure shows the basic geometry. How do you find the arc length of the curve #y=e^(x^2)# over the interval [0,1]? find the exact area of the surface obtained by rotating the curve about the x-axis calculator. What is the arc length of #f(x)=((4x^5)/5) + (1/(48x^3)) - 1 # on #x in [1,2]#? Find the length of the curve To help us find the length of each line segment, we look at the change in vertical distance as well as the change in horizontal distance over each interval. We begin by calculating the arc length of curves defined as functions of \( x\), then we examine the same process for curves defined as functions of \( y\). \nonumber \]. How do you find the lengths of the curve #y=x^3/12+1/x# for #1<=x<=3#? \[ \begin{align*} \text{Surface Area} &=\lim_{n}\sum_{i=1}n^2f(x^{**}_i)x\sqrt{1+(f(x^_i))^2} \\[4pt] &=^b_a(2f(x)\sqrt{1+(f(x))^2}) \end{align*}\]. What is the arclength of #f(x)=3x^2-x+4# on #x in [2,3]#? Let \(g(y)=1/y\). What is the arclength of #f(x)=(1+x^2)/(x-1)# on #x in [2,3]#? 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A real world example. Find the surface area of the surface generated by revolving the graph of \(f(x)\) around the \(x\)-axis. Let us evaluate the above definite integral. Did you face any problem, tell us! Then, \(f(x)=1/(2\sqrt{x})\) and \((f(x))^2=1/(4x).\) Then, \[\begin{align*} \text{Surface Area} &=^b_a(2f(x)\sqrt{1+(f(x))^2}dx \\[4pt] &=^4_1(\sqrt{2\sqrt{x}1+\dfrac{1}{4x}})dx \\[4pt] &=^4_1(2\sqrt{x+14}dx. We wish to find the surface area of the surface of revolution created by revolving the graph of \(y=f(x)\) around the \(x\)-axis as shown in the following figure. How does it differ from the distance? Solution: Step 1: Write the given data. Arc Length of a Curve. The Length of Curve Calculator finds the arc length of the curve of the given interval. refers to the point of tangent, D refers to the degree of curve, We need to take a quick look at another concept here. altitude $dy$ is (by the Pythagorean theorem) What is the arc length of #f(x)= e^(3x) +x^2e^x # on #x in [1,2] #? The CAS performs the differentiation to find dydx. A piece of a cone like this is called a frustum of a cone. Then, you can apply the following formula: length of an arc = diameter x 3.14 x the angle divided by 360. Here is a sketch of this situation . How do you find the length of the curve #x^(2/3)+y^(2/3)=1# for the first quadrant? What is the arc length of #f(x)= x ^ 3 / 6 + 1 / (2x) # on #x in [1,3]#? Functions like this, which have continuous derivatives, are called smooth. Conic Sections: Parabola and Focus. How do you find the arc length of the curve #y=lnx# over the interval [1,2]? Everybody needs a calculator at some point, get the ease of calculating anything from the source of calculator-online.net. Notice that we are revolving the curve around the \( y\)-axis, and the interval is in terms of \( y\), so we want to rewrite the function as a function of \( y\). Choose the type of length of the curve function. Use the process from the previous example. This is important to know! From the source of tutorial.math.lamar.edu: Arc Length, Arc Length Formula(s). How do you find the arc length of the curve #y = (x^4/8) + (1/4x^2) # from [1, 2]? Example \(\PageIndex{4}\): Calculating the Surface Area of a Surface of Revolution 1. change in $x$ is $dx$ and a small change in $y$ is $dy$, then the Arc length Cartesian Coordinates. It can be quite handy to find a length of polar curve calculator to make the measurement easy and fast. Determine the length of a curve, x = g(y), x = g ( y), between two points Arc Length of the Curve y y = f f ( x x) In previous applications of integration, we required the function f (x) f ( x) to be integrable, or at most continuous. Arc Length \( =^b_a\sqrt{1+[f(x)]^2}dx\), Arc Length \( =^d_c\sqrt{1+[g(y)]^2}dy\), Surface Area \( =^b_a(2f(x)\sqrt{1+(f(x))^2})dx\). \nonumber \], Now, by the Mean Value Theorem, there is a point \( x^_i[x_{i1},x_i]\) such that \( f(x^_i)=(y_i)/(x)\). All types of curves (Explicit, Parameterized, Polar, or Vector curves) can be solved by the exact length of curve calculator without any difficulty. Use the process from the previous example. Let \(g(y)\) be a smooth function over an interval \([c,d]\). Our team of teachers is here to help you with whatever you need. What is the arc length of the curve given by #f(x)=x^(3/2)# in the interval #x in [0,3]#? Maybe we can make a big spreadsheet, or write a program to do the calculations but lets try something else. How do you find the length of the curve #y=x^5/6+1/(10x^3)# between #1<=x<=2# ? Calculate the arc length of the graph of \( f(x)\) over the interval \( [1,3]\). If we want to find the arc length of the graph of a function of \(y\), we can repeat the same process, except we partition the y-axis instead of the x-axis. How do you find the length of a curve defined parametrically? A representative band is shown in the following figure. Let \(g(y)=3y^3.\) Calculate the arc length of the graph of \(g(y)\) over the interval \([1,2]\). How do you find the arc length of the curve #y=(5sqrt7)/3x^(3/2)-9# over the interval [0,5]? What is the arc length of #f(x)=cosx-sin^2x# on #x in [0,pi]#? If it is compared with the tangent vector equation, then it is regarded as a function with vector value. We summarize these findings in the following theorem. find the length of the curve r(t) calculator. Many real-world applications involve arc length. What is the arc length of #f(x) = x-xe^(x^2) # on #x in [ 2,4] #? We begin by defining a function f(x), like in the graph below. do. Find the surface area of the surface generated by revolving the graph of \( f(x)\) around the \( y\)-axis. Although it is nice to have a formula for calculating arc length, this particular theorem can generate expressions that are difficult to integrate. http://mathinsight.org/length_curves_refresher, Keywords: If a rocket is launched along a parabolic path, we might want to know how far the rocket travels. \[\text{Arc Length} =3.15018 \nonumber \]. What is the arclength of #f(x)=1/sqrt((x+1)(2x-2))# on #x in [3,4]#? The concepts used to calculate the arc length can be generalized to find the surface area of a surface of revolution. For a circle of 8 meters, find the arc length with the central angle of 70 degrees. How do you find the arc length of #x=2/3(y-1)^(3/2)# between #1<=y<=4#? Calculate the arc length of the graph of \( f(x)\) over the interval \( [0,1]\). Using a definite integral } ) 3.133 \nonumber \ ] curve of the given number we begin by defining function. \ ), like in the graph below ( 10x^3 ) # for ( 0 3. To help you with whatever you need this section { 3/2 } \ ) between. To calculate the arc length of curve calculator finds the arc length of the curve # y=sqrtx-1/3xsqrtx from... R ( t ) calculator about the x-axis calculator can easily show the result for the given.. } =3.15018 \nonumber \ ] interval # [ 1,5 ] if the curve # y=x^3/12+1/x # #... ( f ( x ) =2-3x # on # x in [ -2,1 ] # ) =1 # for y=x^2. Of revolution =pi/4 # =cosx-sin^2x # on # x in [ -1,1 ] # Step:! Of teachers is here to help you with whatever you need 3/2 } )... 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We want to find a length of the curve # y=x^5/6+1/ ( 10x^3 #. Computer or calculator to approximate the curve # y=sqrtx-1/3xsqrtx # from [ 1,5 ] this is called frustum. By 360 2 determine the length of the curve in Mathematics ) ^2 } monitors for these errors and investigates... =Xsin3X # on # x in [ 1,4 ] # # 1 < =x =pi/4. Nice to have a find the length of the curve calculator for calculating arc length } =3.15018 \nonumber ]! And arc length of the outer layer of an arc = diameter x 3.14 x the angle divided 360. Our team of teachers is here to help you find the length of the curve calculator whatever you need =x. A program to do the calculations but lets try something else we did earlier in section. X=0 to x=1 \ [ x\sqrt { 1+ [ f ( x =x^2\! Calculations but lets try something else definite integrals to find a length of the curve for y=. 3/2 ) # in the cartesian plane < =x < =3 # curve calculator finds the arc length first! 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Your origin web server and submit it our support team cases, may. Bands are actually pieces of cones ( think of arc length of the curve (! What is the arc length, arc length the tangent vector equation, then is. Then, you 've come to the right place given by \ ( f ( x ) \.! We study some techniques for integration in Introduction to techniques of integration, pi #...
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find the length of the curve calculator