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Anonymous Anonymous
  • 29-07-2014
  • Mathematics
Answered

prove that\(sin 5x+sin3x/cos5x+cos3x=tan4x\)

Verified Answer :

pepe11
pepe11 pepe11
  • 29-07-2014

sin5x + sin3x = 2sin4x.cosx
cos5x + cos3x = 2cos4x.cosx
so \(\frac{2sin4x.cosx}{2cos4x.cosx}\) = \(\frac{sin4x}{cos4x}\)
= tan4x

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