Question

Find the area of the surface obtained by rotating the following curve about the x axis....

Find the area of the surface obtained by rotating the following curve about the x axis.

y = sin(1/2*x) 0<=x <= pi

Math   Calculus   
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Answer #1

the curve after rotating about x-axis is shown as

By considering the above small disc

Surface area of small disc is

Integrate

Therefore area of surface is

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