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[" (i) Prove that "],[quad sin^(4)theta-...

[" (i) Prove that "],[quad sin^(4)theta-cos^(4)theta=2sin^(2)theta-1]

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

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

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

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

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

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

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

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

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