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10 cards from this deck
sin2θ+cos2θ=1\sin^2 \theta + \cos^2 \theta = 1sin2θ+cos2θ=1
sec2θ\sec^2 \thetasec2θ
csc2θ\csc^2 \thetacsc2θ
sinθcosθ\frac{\sin \theta}{\cos \theta}cosθsinθ
1cosθ\frac{1}{\cos \theta}cosθ1
1sinθ\frac{1}{\sin \theta}sinθ1
2sinθcosθ2 \sin \theta \cos \theta2sinθcosθ
cosθ\cos \thetacosθ (even function)
−sinθ-\sin \theta−sinθ (odd function)
Identical to (stronger than =, true for all values)
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