alleryStart learning →What does the double angle formula give for sin 2θ?
Asin²θ − cos²θ
B2 sinθ cosθ
C2 sinθ + 2 cosθ
D1 − 2 cos²θ
Answer & Solution
Correct answer: B. 2 sinθ cosθ
Putting A = B = θ in sin(A + B) gives sin2θ = 2 sinθ cosθ.
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