Surface Area of Revolution Concepts

The video tutorial explains how to find the surface area of revolution about the x-axis for the function y = 3sin(2x) over the interval [0, π/2]. It introduces the formula for surface area, derives its components, and demonstrates the calculation using both a graphing calculator and manual integration. The tutorial concludes by verifying the results, ensuring the calculated surface area is approximately 61.2428 square units.

What is the function used to find the surface area of revolution in this problem?

• y = 3cos(2x)

• y = 3sin(2x)

• y = 2sin(3x)

• y = sin(3x)

Tags

CCSS.HSF.TF.B.7

What is the interval over which the function is evaluated?

• [π/2, π]

• [0, π/2]

• [π, 2π]

• [0, π]

Which formula is used to calculate the surface area of revolution?

• 2π times the integral of r(x) times the square root of 1 plus f'(x) squared

• π times the integral of r(x) times the square root of 1 plus f(x) squared

• 2π times the integral of f(x) times the square root of 1 plus r(x) squared

• π times the integral of f'(x) times the square root of 1 plus r(x) squared

What is the derivative of the function y = 3sin(2x)?

• 3sin(2x)

• 6cos(2x)

• 3cos(2x)

• 6sin(2x)

What constant is factored out of the integral to simplify it?

• 2

• 12

• 3

• 6

What is the purpose of using a graphing calculator in this section?

• To solve the equation for x

• To plot the graph of the function

• To find the derivative of the function

• To evaluate the integral numerically

What substitution is used in the manual integration process?

• u = 3cos(2x)

• u = 3sin(2x)

• u = 2sin(3x)

• u = 6cos(2x)

What are the new limits of integration after substitution?

• 0 to -6

• -6 to 6

• 6 to -6

• 0 to 6

Tags

CCSS.HSG.GMD.A.3

CCSS.8.G.C.9

What is the approximate surface area calculated in this problem?

• 63.2428 square units

• 60.2428 square units

• 61.2428 square units

• 62.2428 square units

Tags

CCSS.HSG.GMD.A.3

CCSS.8.G.C.9

What method is used to verify the result of the surface area calculation?

• Graphical method

• Numerical approximation

• Analytical integration

• Both calculator and manual methods