Double Angle Identities Formula

Equation for calculate double angle identities is,

Double Angle Identities Equations:
(i). sin(2θ) = 2 sin(θ) × cos(θ)
(ii). cos(2θ) = 1 - 2 sin²(θ)
(iii). tan(2θ) = [2 tan(θ)]/[1-tan2(θ)]