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10 cards from this deck
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 of θ\thetaθ
1−cos2θ1 - \cos^2\theta1−cos2θ
1−sin2θ1 - \sin^2\theta1−sin2θ
The quadrant the angle is in
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