Question

a=30 sin 2a = 2sinacosa​

Answer 1

Answer:

☯ Given: a = 30°

☯ To prove:  sin 2a = 2sinacosa​

☯ Solution:  

LHS: sin (2×30°) = sin 60 = √3 / 2

RHS: 2 sin30° cos30° = 2×1/2×√3/2 = 2×√3/4 = √3 / 2

∴ LHS=RHS

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