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10 questions from this quiz
Cofunction identities
cosθ\cos \thetacosθ
sinθ\sin \thetasinθ
−sinθ-\sin \theta−sinθ
cos2θ+sin2θ=1\cos^2\theta + \sin^2\theta = 1cos2θ+sin2θ=1
All values
1625\frac{16}{25}2516
Second quadrant
sin2θ=1−cos2θ\sin^2\theta = 1 - \cos^2\thetasin2θ=1−cos2θ
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