Sine and Cosine rules (OCR GCSE Maths): Quizzes

Any triangle

Two angles and one side (AAS or ASA)

$\frac{a}{\sin A}=\frac{b}{\sin B}=\frac{c}{\sin C}$

Two angles and the length of a side

Two sides and angle not included

Three sides (SSS) or SAS

$a^2=b^2+c^2-2bc\cos A$

The angle between two sides

All three side lengths

$\sin^{-1}$

$\cos^{-1}$

Cosine Rule