Hey Guys I have some very hard math hw questions. I really have no idea how to start or anything. I am clueless.
1.)Sketch the region enclosed by the given curves. Find the area of the region y=sinx,y=sin2x,x=0, and x=pie/2
2.) Find the area bounded by the curves y=4-(x squared) and y=2x+1.
3.) Find the volume of the solid obtained by rotating the region in #2 around the line x=2
4.)Let R be the region bounded by the graphs of y=square root of (x squared -9), y=0, x=3, and x=5. Compute the volume of the solid formed by revolving R about the y axis and x axis.
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use definite integrls to find area.

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