You are Here: Home >< Maths

# Inverse Trigonometric Function Watch

1. Hello

The question is:

If f(x) is identically equal to sinx+cosx and x is greater than -0.25pi and less than 0.25pi, find the inverse function.

I have no idea how to go about this. I know that I need to rearrange the equation so that I write x in terms of f(x) and then restrict the range of the inverse function but I have no idea how to write x in terms of f(x).

2. Rcos(x-a) maybe.
3. (Original post by Get me off the £\?%!^@ computer)
Rcos(x-a) maybe.
I do not know what you mean.
4. (Original post by Magu1re)
Hello

The question is:

If f(x) is identically equal to sinx+cosx and x is greater than -0.25pi and less than 0.25pi, find the inverse function.

I have no idea how to go about this. I know that I need to rearrange the equation so that I write x in terms of f(x) and then restrict the range of the inverse function but I have no idea how to write x in terms of f(x).

let f(x)=y and on 2nd power
y^2=1+sin2x ->x

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: November 27, 2010
Today on TSR

### Degrees to get rich!

... and the ones that won't

### Cambridge interviews pour in...

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

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