.Originally Posted by norivea
Sketch this function over this range - you will see that it is anti-symmetric
about , so the integral is zero.
Hello,Originally Posted by norivea
according to your working you didn't evaluate the integral but you calculated the area which is enclosed by the x-axis, the graph of the cosine function and the lines x = 0 and x = pi. So you calculated:
which differs from your orginal integral.