You are Here: Home >< Maths

Core 4 trig identity

Announcements Posted on
Why bother with a post grad? Are they even worth it? Have your say! 26-10-2016
1. Prove:
tanxsec(0.5x) = 2sin(0.5x)secx

Could someone please tell me how to work this one out?
2. (Original post by Smcdonald98)
Prove:
tanxsec(0.5x) = 2sin(0.5x)secx

Could someone please tell me how to work this one out?
Starting with the LHS, note that . Can you express in terms of and ? Hint: Double angle formulae.
3. (Original post by Smcdonald98)
Prove:
tanxsec(0.5x) = 2sin(0.5x)secx

Could someone please tell me how to work this one out?
which paper is this from?
4. easiest thing ever is c4
5. (Original post by Farhan.Hanif93)
Starting with the LHS, note that . Can you express in terms of and ? Hint: Double angle formulae.
Got it now, thanks!
6. (Original post by EconEast)
which paper is this from?
It's from the CCEA textbook

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: May 26, 2016
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

Who is getting a uni offer this half term?

Find out which unis are hot off the mark here

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

Chat with other maths applicants