← Prev: Circle Sectors and Triangles Next: Tangent Addition and Subtraction Formulae →

Sine and Cosine Addition and Subtraction Formulae | Year 2 Pure | A Level Maths

The compound angle formulae are powerful identities that unlock many trigonometric problems. In this lesson you will learn how to use the formulae for sin(A +/- B) and cos(A +/- B), understand the geometrical proofs of these formulae, and apply them to evaluate exact values of trig functions and to prove further identities. The lesson lays the groundwork for the double angle formulae and the R sin / R cos form.

Stage 1

Learning

Video lessons

Stage 2

Practice

Worksheets

Stage 4

Past paper revision

Past papers

A* questions

Stage 3

Topic revision

Exam questions by topic

Revision notes

Only follow this arrow when you have covered the whole curriculum.

Lesson Video On Sine and Cosine Addition and Subtraction Formulae

Follow the lesson video carefully with a pen and paper. By the end of it you should be comfortable with this topic. If you want a blank copy of this lesson to follow along, scroll down to the PDF viewer below and select “Student Notes Template” and download using the link at the top of the PDF viewer.

Lesson Resources For Sine and Cosine Addition and Subtraction Formulae

Here you will find all of the PDF resources for the lesson on Sine and Cosine Addition and Subtraction Formulae. Please choose from the dropdown menu below. You are able to download worksheets and notes templates to help you follow the video lesson. Mark schemes and solutions are not downloadable.