Solve This If cos A +cos2 A=1Prove that sin2A+sin4A=1 - Maths - Introduction to Trigonometry

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Solve This

I f   cos   A   + cos 2   A = 1 P r o v e
  t h a t   sin 2 A + sin 4 A = 1

Brijendra Pal · Accepted Answer

Hi,
Q-8
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Solve This I f cos A + cos 2 A = 1 P r o v e t h a t sin 2 A + sin 4 A = 1

Solve This

$I f \cos A + \cos^{2} A = 1 P r o v e t h a t \sin^{2} A + \sin^{4} A = 1$