x Turn on thread page Beta
 You are Here: Home >< Maths

# Integration question watch

1. How do u do the integration question
2. I think you should get a better picture coz it like half cut off
3. Assuming you mean the top one with sine squared in it - use a double angle identity.
4. use cos2A = cos^2(A)-sin^2(A)

but let A = 3x
5. If you find it hard to remember the formula of cos2a=... in all its different forms i find it useful to use that cos2a=cos^2(x)-sin^2(x) and work from there as needed
6. If the integral of a term isn't known, use an identity that you know to write it differently into something you do know how to integrate.

Such as quoted:

(Original post by B_9710)
(Separate each term after this and integrate as you know how to).

TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

This forum is supported by:
Updated: February 21, 2016
Today on TSR

### Unconditional offer...

But going to get a U!

Poll
Useful resources

### Maths Forum posting guidelines

Not sure where to post? Read the updated guidelines here

### How to use LaTex

Writing equations the easy way

### Study habits of A* students

Top tips from students who have already aced their exams