This is the question and the integral i setup. But its wrong. Not sure where i went wrong.
This is the equation that I setup
I also tried setting x range to but i kept getting zero.
Last edited by tastylick; October 11th 2013 at 08:13 PM.
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Hint: Your x limits should be from -pi to +pi (as you have suggested). Using this gives us
Integral [0,pi/2] sin(y)[-cos(pi) + cos(-pi)]dy
Integral [0,pi/2] sin(y)[-1-1]
Integral [0,pi/2[ -2*sin(y)
= 2[cos(pi/2) - cos(0)] = -2.
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