Mathematics for IGCSE & O level - Pythagoras' Theorem And Trigonometry (Section 6 - No. 9)
Which trigonometric function is used when you know the adjacent and hypotenuse sides, and you want to find an angle?
Sine
Cosine
Tangent
Cotangent
Објашњење
Cosine is used with Adjacent and Hypotenuse sides.