Math, asked by bablu1496, 1 year ago

Prove that =Sin5x-2sin3x+sinx/cos5x-cosx. =tanx

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Answered by blade58

0

LHS = rhs = tanx= sin4x/cos 4x

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bablu1496: How u do this

bablu1496: plz send me answers in step by step

bablu1496: am not understand how you do the sum

Answered by diya654321

6

formula sina+ sinb = 2 sin(a+b)/2 sin(a-b)/2

cosa-cosb= -2sin(a+b)/2 sin(a-b)/2

cos2a-1= 1-2(sina)sqr

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