You are Here: Home >< Maths

# Help - C4 integration ! Watch

1. The question is from the Heinemann Edexcel C4 book, 6G, Question 3.e.:

Integrate x^22sec^2xtanx dx

I've figured out u = x^2, and du/dx = 2x

And dv/dx = 2sec^2xtanx, but I can't figure out how to get v? Any help would be appreciated !!
2. (Original post by oceanicccc)
The question is from the Heinemann Edexcel C4 book, 6G, Question 3.e.:

Integrate x^22sec^2xtanx dx

I've figured out u = x^2, and du/dx = 2x

And dv/dx = 2sec^2xtanx, but I can't figure out how to get v? Any help would be appreciated !!
Try differentiating

By the way, you need to take more care when typing up questions. I thought your question read
3. if you want to type powers then...

sec2x can be written sec{sup}2{/sup}x but replace each { with a [
4. (Original post by the bear)
if you want to type powers then...

sec2x can be written sec{sup}2{/sup}x but replace each { with a [
I'd prefer them to use LaTex really.
5. (Original post by Mr M)
I'd prefer them to use LaTex really.
the sup and sub is less stressful than latex
6. (Original post by the bear)
the sup and sub is less stressful than latex
“I have little patience with scientists who take a board of wood, look for its thinnest part, and drill a great number of holes where drilling is easy.” Albert Einstein
7. (Original post by Mr M)
“I have little patience with scientists who take a board of wood, look for its thinnest part, and drill a great number of holes where drilling is easy.” Albert Einstein
Latex Schmatex... sorry Albert
8. (Original post by the bear)
Latex Schmatex... sorry Albert
9. (Original post by Mr M)

10. (Original post by Mr M)
“I have little patience with scientists who take a board of wood, look for its thinnest part, and drill a great number of holes where drilling is easy.” Albert Einstein
You're helping a student with an A-Level maths question on an internet forum. Your argument is like suggesting text speak is foolish because authors use full sentences and correct grammar.
11. (Original post by PythianLegume)
You're helping a student with an A-Level maths question on an internet forum. Your argument is like suggesting text speak is foolish because authors use full sentences and correct grammar.
You don't have to be a published author to write properly. Text speak is prohibited on TSR because it is an academic website.

Browsing the TSR LaTex Wiki for about 5 minutes will allow the OP to avoid ambiguity and confusion in the future and make it easier for people to help him.
12. 10 replies, only 1 tries to help OP. Welcome to TSR.
P.S. It's 11/1 now.
13. (Original post by oceanicccc)
The question is from the Heinemann Edexcel C4 book, 6G, Question 3.e.:

Integrate x^22sec^2xtanx dx

I've figured out u = x^2, and du/dx = 2x

And dv/dx = 2sec^2xtanx, but I can't figure out how to get v? Any help would be appreciated !!
Is your question, how to integrate, ?
14. (Original post by bogstandardname)
Is your question, how to integrate, ?
Yes and it was answered in post 2.

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: March 31, 2013
Today on TSR

### How to stand out in an Oxbridge interview

What makes you memorable?

### When did you discover TSR?

Discussions on TSR

• Latest
• ## See more of what you like on The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

• 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

## Groups associated with this forum:

View associated groups
Discussions on TSR

• Latest
• ## See more of what you like on The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

• The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE