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Consider the region between the graph of fx=1-cosxand the x-axison 0,Ï€. For the each line of rotation, write down definite integrals that represent the volume of the resulting solid and then use a calculator or computer to approximate the integrals.

Short Answer

Expert verified

The answer isV=π22-3π2≈24.674

Step by step solution

01

Step 1. Given information

Given the graph of fx=1-cosxand x-axison 0,Ï€and the figure is

02

Step 2. Let us find the volume of solid.

The volume of solid of revolution Rxand rxrotated along x-axison interval a,bisrole="math" localid="1649522865857" V=π∫abRx2-rx2dx

Then, substitute the values

role="math" localid="1649523475727" V=π∫0π1-cosx2-22dxV=π∫0π1-cosx2-4dxV=π∫0π1-2cosx+cos2x-4dxV=π∫0π-2cosx+cos2x-3dxV=π∫0π-2cosxdx+∫0πcos2xdx-∫0π3dxV=π0+π2-3πV=π22-3π2≈24.674

The answer isV=π22-3π2≈24.674

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