Learn how to solve for the lengths of the sides and the measures of the angles of a triangle using the law of cosines. The ...

👉 Learn all about sum and difference angle identities. In this video playlist, you will learn how to evaluate, solve, simplify, and verify using sum and difference angle identities. We will evaluate ...

Being able to identify which formula to use, sine or cosine, and when, is necessary to answer questions on this topic successfully. Check you are confident in how to use the sine and cosine rules.