Sin, Cos, Tan (OCR GCSE Maths): Flashcards

Right-angled triangles only

0.5

Longest side, opposite right angle

Side opposite angle $\theta$

Side next to $\theta$, not hypotenuse

$\frac{O}{H}$ (Opposite/Hypotenuse)

$\frac{A}{H}$ (Adjacent/Hypotenuse)

$\frac{O}{A}$ (Opposite/Adjacent)

Sin = Opposite/Hypotenuse

Cos = Adjacent/Hypotenuse

Tan = Opposite/Adjacent

Use inverse: $\sin^{-1}$