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[" खr़ "20.cos^(2)0^(@)-2cot^(2)30^(@)+3...

[" खr़ "20.cos^(2)0^(@)-2cot^(2)30^(@)+3cosec^(2)90^(@)=],[2(sec^(2)45^(@)-tan^(2)60^(@))]

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Evaluate each of the following : (sin^(2)+30^(@)+4cot^(2)45^(@)-sec^(2)60^(@))(cosec^(2)45^(@)sec^(2)30^(@))

cot^(2)30^@-2cos^(2)30^@-(3)/(4)sec^(2)45^@+(1)/(4)csc^(2)30^@

Evaluate each of the following :- (cosec^(2)45^(@)sec^(2)30^(@))(sin^(2)30^(@)+4cot^(2)45^(@)-sec^(2)60^(@))

Evaluate: "cosec"^(2)30^(@)+sec^(2)60^(@)+tan^(2)30^(@) .

Evaluate each of the following :- (tan^(2)60^(@)+4cos^(2)45^(@)+3sec^(2)30^(@)+5cos^(2)90^(@))/(cosec30^(@)+sec60^(@)-cot^(2)30^(@))

Prove that : 3cosec^(2)60^(@)-2cot^(2)30^(@)+sec^(2)45^(@)=0 .

Prove that : 3cosec^(2)60^(@)-2cot^(2)30^(@)+sec^(2)45^(@)=0 .

If x sin45^(0)cos^(2)60^(@)=(tan^(2)60^(@)cos ec30^(@))/(sec45^(@)cot^(2)30^(@)) then x=