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10 questions from this quiz
cos2θ+sin2θ=1\cos^2\theta + \sin^2\theta = 1cos2θ+sin2θ=1
12\frac{1}{2}21
1:1:21 : 1 : \sqrt{2}1:1:2
Quadrant 1
sinθ\sin\thetasinθ
cosθ\cos\thetacosθ
180°180°180°
Two sides and included angle
a2=b2+c2−2bccosAa^2 = b^2 + c^2 - 2bc \cos Aa2=b2+c2−2bccosA
sin(2θ)=2sinθcosθ\sin(2\theta) = 2 \sin\theta \cos\thetasin(2θ)=2sinθcosθ
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