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10 questions from this quiz
sinAcosB+cosAsinB\sin A \cos B + \cos A \sin BsinAcosB+cosAsinB
cosAcosB+sinAsinB\cos A \cos B + \sin A \sin BcosAcosB+sinAsinB
2sinθcosθ2\sin \theta \cos \theta2sinθcosθ
1−2sin2θ1 - 2\sin^2 \theta1−2sin2θ
The quadrant in which θ2\frac{\theta}{2}2θ lies
12[sin(A+B)+sin(A−B)]\frac{1}{2}[\sin(A+B) + \sin(A-B)]21[sin(A+B)+sin(A−B)]
2sin(A+B2)cos(A−B2)2\sin\left(\frac{A+B}{2}\right)\cos\left(\frac{A-B}{2}\right)2sin(2A+B)cos(2A−B)
cosθ\cos \thetacosθ
tanx\tan xtanx
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