Mathematics Stack Exchange is a question and answer site for people studying math at any level and professionals in related fields. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

Possible Duplicate:
Evaluating $\int P(\sin x, \cos x) \text{d}x$

I'm given, $$\int \sin^2(x) \,dx$$

I'm struggling finding the appropriate value for u to integrate using u-substitution.

Any suggestions?


share|cite|improve this question

marked as duplicate by Jonas Meyer, Aryabhata, Akhil Mathew Apr 7 '11 at 23:37

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

@Jonas Meyer @Moron @Akhil The difference between this question and the "duplicate" is that this is one specific question and it'd take someone a while to wade through that very long answer in the "duplicate" question to get to this part. The answer to that question is basically the same as a textbook section on this stuff, which the OP can probably see themselves by looking at a textbook. This guy needs help with this one specific question. If you want to merge any questions that are somewhat similar, you might as well answer this type of question with "Read your textbook." – Graphth Apr 8 '11 at 14:59

$\sin^2 x = \frac{1 - \cos(2x)}{2}$. Now you can integrate it.

share|cite|improve this answer

I'd try thinking about your trig identities and whether you know anything that would make $sin^2(x)$ simpler before jumping to u-sub.

share|cite|improve this answer

Not the answer you're looking for? Browse other questions tagged or ask your own question.