Mathematics for IGCSE & O level - Pythagoras' Theorem And Trigonometry (Section 5 - No. 48)
Which trigonometric function relates the adjacent side and the hypotenuse?
Sine
Cosine
Tangent
Cosecant
הֶסבֵּר
Cosine = Adjacent / Hypotenuse (CAH from SOH CAH TOA)