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[" 13.सिद्ध कीजिए- "],[2(sin^(2)45^(@)+c...

[" 13.सिद्ध कीजिए- "],[2(sin^(2)45^(@)+cot^(2)30^(@))-3(cosec^(2)60^(@)-sec^(2)60^(@))=15]

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Evaluate sin^(2)45^(@)+cos^(2)60^(@)+cosec^(2)30^(@) .

cos^(2)0^@-2cot^(2)30^(@)+3cosec^(2)90^(@)=2(sec^(2)45^(@)-tan^(2)60)

Calculate : sec^(2)45^(@)-cot^(2)45^(@)-sin^(2)30^(@)-sin^(2)60^(@) .

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Calculate : sin^(2)45^(@)-"cosec"^(2)60^(@)+sec^(2)30^(@) .

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Find the value of sin^(2)45^(@)-"cosec"^(2)60^(@)+sec^(2)30^(@) .

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

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