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Sin a+sin^2a=1 then cos^2a+cos^4a=  
Asked by anilavthomas | 16 Jan, 2019, 09:31: PM
answered-by-expert Expert Answer
sin A + sin2A = 1  ...........................(1)
 
sinA = 1 - sin2A = cos2A
 
cos2A = sinA
cos4A = sin2A
cos2A + cos4A = sin A + sin2A = 1  ( by sing eqn.(1) )
Answered by Thiyagarajan K | 16 Jan, 2019, 10:46: PM

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