Trigonify

Double Angle

sin 2θ

sin⁡2θ=2sin⁡θcos⁡θ\sin 2\theta = 2 \sin\theta \cos\theta

Related Double Angle identities

cos 2θtan 2θ

Study this and 44 more identities in the Trigonify workspace — an interactive unit circle, a step-by-step triangle solver, quizzes, and a practice problem bank.