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# Pure 1 Chapter 10 - Trigonometric Identities & Equations

Designed to accompany the Pearson Pure Mathematics Year 1/AS textbook.

## Mrs K Wilson

### 6th Nov 2019 Flag Comment

Question 1 and Question 2 on the P1 Ch 10 v1 assessment are the same manipulation. Apologies if this has been flagged up before.

## Mrs S Wallace

### 12th Jan 2019 Flag Comment

Chapter 10 slide 16 MAT 2008 1C. There is an error in the question but not in the workings of answer. In the second equation you have cos theta x + sin theta y it should be sin theta x + cos theta y. You altered it when Steph Richards raised this but I think changed the wrong one.

## M Schafer

### 3rd Nov 2018 Flag Comment

Slide 6: When ðœƒ=270Â°, sinðœƒ should be '-1'

## Dr J Frost

### 1st Mar 2018 Flag Comment

I've fixed the errors reported below.

### 26th Feb 2018 Flag Comment

Tan -45 =-1, not 1. Thanks, as ever, for these resources. Slide 10.

## Mr Ed

### 14th Jan 2018 Flag Comment

You are a legend. A lot of teachers and students around the world respect you kind sir.

### 7th Dec 2017 Flag Comment

tysm this helped me with my trig test today

## Sarah

### 25th Nov 2017 Flag Comment

I can't thank you enough for making all your resources available. My 2 i/c, in charge of KS5 has been off since July so all the preparation for the new spec has devolved onto me. I have been able to prepare lessons much more quickly than anticipated thanks to you.

## Steph Richards

### 7th Sep 2017 Flag Comment

Chapter 10 slide 16 MAT 2008 1C. There is an error in the question but not in the workings of answer. In the second equation you have sin theta x + sin theta y the second sin should be cos. The answer workings is fine.

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