Math, asked by dd2290045, 1 year ago

SinA-2Sin^3A/2Cos^3A-CosA=tanA
Prove that :

SinA (1-2sin^2A)

Answers

Answered by numan12
15

Here's Ur answer

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Answered by sandy1816
0

 \frac{sina - 2 {sin}^{3} a}{2 {cos}^{3} a - cosa}  \\  \\  =  \frac{sina(1 - 2 {sin}^{2} a)}{cosa(2 {cos}^{2}a - 1) }  \\  \\  =  \frac{sina(cos2a)}{cosa(cos2a)}  \\  \\  =  \frac{sina}{cosa}  \\  \\  = tana

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