Homework Help: calculus

Posted by Sam on Saturday, January 15, 2011 at 7:23pm.

Consider the region of the x-y plane between the line y=7, the curve y=3sinx+4, and for -pi/2 is less than or equal to x which is less than or equal to pi/2.

Find the volume of the solid generated by revolving this region about the line .

calculus - drwls, Saturday, January 15, 2011 at 8:47pm
Is it being rotated about the line y = 7 or y = 0 ?

If it is about y = 7, compute the integral of
pi*(3 sinx +4 -7)^2 dx
= pi*(3 sinx -3)^2
between the two x limits

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