If Sin Theta + Sin^2 Theta + Sin^3 Theta= 1, Prove That Cos^6 Theta -4Cos^4 Theta + 8Cos^2 Theta=4.

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sin^6(theta)+cos^6(theta) ,equal 1-3sin^2(theta).Cos^2(theta)@Mathby1069

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show that sin ^6 theta + cos ^6 theta = -1/8 ( 5 + 3 cos 4 theta )/ easy solving / try hard

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`cos^3 2theta+3cos2theta=4(cos^6theta-sin^6 theta)`

if sin theta-cos theta=0 then sin^(4)theta+cos^(4)theta=? if sina-cosa=0 find sin4a+cos4a