Math, asked by manjit73, 10 months ago

show that sinA=sin3A/1+2cos2A deduce the value of sin15°

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Answered by danielshivasai

13

Answer this question and win ... sin3A = 3sinA - 4sin3A = sinA(3 - 4sin2A) = sinA. 1+2cos2A 1+2(1- 2sin2A) (3 ...

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