Level 466 Level 468
Level 467

Double Angle Identities


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sin(2θ)
2sinθcosθ
cos(2θ)
cos₂θ-sin₂θ
cos(2θ)
1-2sin₂θ
cos(2θ)
2cos₂θ-1
tan(2θ)
(2tanθ)/(1-tan₂θ)