x Turn on thread page Beta
 You are Here: Home >< A-levels

# C4 Trig identities in Integration watch

Announcements
1. intergrate (cosx-secx)^2
Could you explain how to deal with -2tanxcotx ?
intergrate (cosx-secx)^2
Could you explain how to deal with -2tanxcotx ?
I'll assume this is the first time you've encountered trig.

So first you should know: Cot x = 1/tanx

Now multiply cotx with tanx....

Giving us tanx/tanx = 1
3. By definition, . Multiply this by and what happens?
4. (Original post by tinkerbella~)
By definition, . Multiply this by and what happens?
I already marked my territory here.
5. (Original post by High Stakes)
I already marked my territory here.
Do I look like I care?
6. (Original post by tinkerbella~)
Do I look like I care?
I can't see you, so I don't know. Why would you ask such a stupid question? Unless you're stupid.
7. (Original post by High Stakes)
I can't see you, so I don't know. Why would you ask such a stupid question? Unless you're stupid.
Almost as stupid as you.
8. (Original post by tinkerbella~)
Almost as stupid as you.
9. (Original post by tinkerbella~)
Almost as stupid as you.
It's banter. You guys take yourselves too seriously. If you think 'I marked my territory here' was an actual insult or way of me telling you to go away then you jheez. Lol.
10. (Original post by High Stakes)
It's banter. You guys take yourselves too seriously. If you think 'I marked my territory here' was an actual insult or way of me telling you to go away then you jheez. Lol.
High stakes you sir are a legend i respect you ;D im joking man you're cool you motivate me ;D
11. (Original post by High Stakes)
It's banter. You guys take yourselves too seriously. If you think 'I marked my territory here' was an actual insult or way of me telling you to go away then you jheez. Lol.
Chill man, sarcasm.
High stakes you sir are a legend i respect you ;D im joking man you're cool you motivate me ;D
Very good padawan. Get the grades you need to get the life you want.
13. (Original post by High Stakes)
Very good padawan. Get the grades you need to get the life you want.
Aye sir! Let's do this!
14. thanks mate
(Original post by High Stakes)
I'll assume this is the first time you've encountered trig.

So first you should know: Cot x = 1/tanx

Now multiply cotx with tanx....

Giving us tanx/tanx = 1

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 5, 2016
Today on TSR

### How much will your degree earn you?

Find out where yours ranks...

Poll

## All the essentials

### Student life: what to expect

What it's really like going to uni

### Essay expert

Learn to write like a pro with our ultimate essay guide.

### Create a study plan

Get your head around what you need to do and when with the study planner tool.

### Resources by subject

Everything from mind maps to class notes.

### Study tips from A* students

Students who got top grades in their A-levels share their secrets