Prove: 3x - x = 2 x 2x

MATHEMATICS · Subjective · AP · AP Precalculus · Trigonometric and Polar Functions · Trigonometric and Polar Functions

Problem

Prove: sin⁡3x−sin⁡x=2sin⁡xcos⁡2x\sin 3x - \sin x = 2 \sin x \cos 2x

Related theory

Browse the problem library