## anonymous 4 years ago help with my calculus hw

1. anonymous

Sure.

post

3. anonymous

$\int\limits_{?}^{?}(\sin ^{2}x -\cos ^{2}x)/(sinx)$

4. anonymous

u=sin(x)? Rewrite cos2(x) as 1-sin2(x) The "2" is a power, btw.

5. anonymous

Yes, Stenly knows what he's saying.

6. anonymous

i think a work out would be more helpful because im not understanding what you are saying

Stenly wtf? :D

8. anonymous

@stenly i was calculus was that easy, lol

9. anonymous

Actually, ignore me. Take the 1/sin(x) and turn it into csc(x). Expand it out.

10. anonymous

Integrate by terms then.

11. anonymous

i am still confused

12. anonymous

what do you mean by expand it out

13. anonymous

Alright, so csc(x)(sin2(x)-cos2(x)). Can we agree with that? (The 2 is a power.) This is the same as csc(x)sin2x-csc(x)(cos2(x)), which is the same as sinx-cotxcosx.

14. anonymous

Hmm, I don't know why cotxcosx can be rewritten as cscx-sinx... Wait...