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Prove that sin^4theta-cos^4theta=sin^2th...

Prove that `sin^4theta-cos^4theta=sin^2theta-cos^2theta`

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Prove that sin^(4)theta-cos^(4)theta=sin^(2)theta-cos^(2)theta

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Prove that (sin^(4)theta-cos^(4)theta)/(sin^(2)theta-cos^(2)theta)=1

sin^2theta+cos^4theta=cos^2theta+sin^4theta

Prove that : sin^(4)theta-cos^(4)theta=2sin^(2)theta-1

Prove that cos^4 theta-sin^4 theta=1-2sin^2 theta

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prove that- sin^2theta/cos^2theta+cos^2theta/sin^2theta=1/ (sin^2thetacos^2theta)-2

Show : Sin^4theta - Cos^4theta = Sin^2theta - Cos^2theta