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Find the value of 2(sin^(6)theta+cos^(6)...

Find the value of `2(sin^(6)theta+cos^(6)theta)-3(sin^(4)theta+cos^(4)theta)`

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The correct Answer is:
`=2-6 sin ^(2)theta cos ^(2) theta -3+6 sin^(2) theta cos^(2) theta =2-3=1`
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