You are Here: Home

# C3 HELP

Announcements Posted on
Talking about ISA/EMPA specifics is against our guidelines - read more here 28-04-2016
1. Can anyone help me out on the 7th question of the june 2007 c3 paper, its part (a) thats confusing... plz help is much appreciated.
2. (Original post by Harshana12)
Can anyone help me out on the 7th question of the june 2007 c3 paper, its part (a) thats confusing... plz help is much appreciated.
No body can help unless you tell which board are you on.

Also give the link to the paper.
3. http://www.scribd.com/rainman875/d/1...question-paper

4. Hey! I have C3 this morning also, going to be fun!

Anyway, what you want to do is to first of all combine the two fractions...

This leaves you with sin^2+cos^2 on the top (which equals one) and sin x cos on the bottom. Do you know your identites sunny Jim? 2sinxcosx = sin2x

Sub that in and you are left with 1/0.5sin2x, which of course equals 2/sin2x = 2cosec2x
QED

Good luck today
5. How was the paper?, for me it was kind of easy but im not sure about that proving sec^2x question.THNX for the answer btw
6. (Original post by Harshana12)
How was the paper?, for me it was kind of easy but im not sure about that proving sec^2x question.THNX for the answer btw
The paper discussion and its solutions are on this thread.

## Register

Thanks for posting! You just need to create an account in order to submit the post
1. this can't be left blank
2. this can't be left blank
3. this can't be left blank

6 characters or longer with both numbers and letters is safer

4. this can't be left empty
1. Oops, you need to agree to our Ts&Cs to register

Updated: June 15, 2012
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:
Today on TSR

### How to predict exam questions

No crystal ball required

Poll
Useful resources

### Maths Forum posting guidelines

Not sure where to post? Read here first

### How to use LaTex

Writing equations the easy way

### Study habits of A* students

Top tips from students who have already aced their exams