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The numerical value of (cos^(2)45^(@))...

The numerical value of
`(cos^(2)45^(@))/(sin^(2)60^(@))+(cos^(2)60^(@))/(sin^(2)45^(@))-(tan^(2)30^(@))/(cot^(2)45^(@))-(sin^(2)30^(@))/(cot^(2)30^(@))` is

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Show that 2(cos^(4)60^(@)+sin^(4)30^(@))-(tan^(2)60^(@)+cot^(2)45^(@))+3sec^(2)30^(@)=1/4

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The value of (sec^(2)45^@-cot^(2)45^@)-(sin^(2)30^@+sin^(2) 60^(@)) is