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If cosA+cos^2A=1, prove that sin^2A+sin^4A=1

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asked Feb 15, 2018 by Kundan kumar (49,132 points) ● 34 ● 436 ● 1366

If cosA+cos2A=1, prove that sin2A+sin4A=1

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answered Feb 15, 2018 by Vikash Kumar (144,729 points) ● 8 ● 11 ● 26
 
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   Hence proved

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