(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

The direction is the evaluate the integral, this isn't really a calculus issue, it's more of a trig issue.

∫sinx(dx)/(1+cos^2x) from ∏/2 to ∏

2. Relevant equations

(1/a)arctan(u/a)+c

3. The attempt at a solution

I did all the integrating and ended up at

-arctan(cosx) from ∏/2 to ∏

this is where I'm stuck, I know I'm suppose to use the fundamental theorum of Calculus but I don't know what to do once I plug in ∏/2 and ∏. How do I generate values out of this? Do I draw a triangle? Do I use the unit circle? If so, how would I use it

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# Homework Help: How to evaluate -arctan(cosx) from ∏/2 to ∏

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