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Evalutate : 4(sin^(4) 30^@+cos^(4) 60^@)...

Evalutate : `4(sin^(4) 30^@+cos^(4) 60^@)-2/3 (sin^2 60^@-cos^(2)45^(@))+1/2 tan^(2) 60^@`

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The correct Answer is:
`(11)/6`
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