SOLUTION: Evaluate {{{int((x/(1+cos^2(x))), dx, 0, pi)}}}, and please give detailed solution.

Question 1027913: Evaluate , and please give detailed solution.
Answer by robertb(5830) (Show Source): You can put this solution on YOUR website!

by using the identity .
Now let and substitute into the second integral.
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Now , by letting and .
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=
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