Posted by **Janet** on Monday, May 9, 2011 at 11:39pm.

Evaluate integral, don't use calculator.

I'll use the S as the sign for integral

S 4 sin (theta)d(theta) from pi/2 to pi

I know the answer is 4 because I enter it in on my calculator, but don't know the steps to get to the answer.

Please help.

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