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[" EXAMPLE I Prove the following identit...

[" EXAMPLE I Prove the following identities: "],[[" (i) "sin^(8)theta-cos^(8)theta=(sin^(2)theta-cos^(2)theta)(1-2sin^(2)theta cos^(2)theta)," ( "cos^(2)theta)]],[" (ii) "cot^(4)theta+cos^(2)theta=(sin^(2)theta-cos^(2)theta)(1-2sin^(2)theta cos^(2)theta)]

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