You are Here: Home >< A-levels

# Mathematics C3 solution

Announcements Posted on
Last day to win £100 of Amazon vouchers - don't miss out! Take our quick survey to enter 24-10-2016
REMINDER: Do not post your personal statement on TSR, otherwise you may have to rewrite it from scratch. Click here for more info. 11-10-2016
1. Does anyone know how to solve this question?

Solve the equation, giving all values of x to the nearest degree in the interval 0<x<360: 2tan²x + secx - 1 = 0
2. Use
3. (Original post by susans_crumpets)
Does anyone know how to solve this question?

Solve the equation, giving all values of x to the nearest degree in the interval 0<x<360: 2tan²x + secx - 1 = 0
Use identity
4. Use the identity and see where that gets you
5. Use this identity
6. Well, nice to know at least three people have given the same advice eh?
7. (Original post by dancepiratedance)
Well, nice to know at least three people have given the same advice eh?
Reckon we need more people to say the same thing?
8. (Original post by RDKGames)
Reckon we need more people to say the same thing?
I think so, just to be absolutely sure
9. Use:

## 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
your full birthday is required
1. Oops, you need to agree to our Ts&Cs to register

Updated: September 1, 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

### How does exam reform affect you?

From GCSE to A level, it's all changing

### Q&A with Paralympian Jack Rutter

Poll
Help with your A-levels

## 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.

### Uni match

Our tool will help you find the perfect course for you

### 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.

### Degrees without fees

Discover more about degree-level apprenticeships.

### Study tips from A* students

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

## Study help links and info

Can you help? Study help unanswered threadsRules and posting guidelines

### HEAR

Find out how a Higher Education Achievement Report can help you prove your achievements.

## Groups associated with this forum:

View associated groups
Study resources

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

Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.