Question

Find the value of A in Sin 2A=Cos(A-300 )​

Answer 1

Answer:

If A=30°,

sin2A=2sinAcosA

sin(2×30°)=2sin30°cos30°

sin60°=2sin30°cos30°

23=2×21×23

23=23

∴LHS=RHS

Explanation:

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