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CBSE Class 11-science Answered

If cosA+cos^2A =1 ;prove that sin^2+sin^4=1
Asked by | 16 Jul, 2008, 02:23: PM
answered-by-expert Expert Answer

 If  cosA+cos^2A =1    ------(i)
cos A = 1- cos^2 A
cos A =  sin^2A 
sin^2+sin^4 = sin^2A + (sin^2A )^2  = (cos A + (cos A)^2 = 1

Answered by | 16 Jul, 2008, 05:12: PM
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