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" Iy "2tan^(2)45^(@)+cos^(2)x^(@)-sin^(2...

" Iy "2tan^(2)45^(@)+cos^(2)x^(@)-sin^(2)60^(@)

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Evaluate : 2tan^(2)45^(@)+cos^(2)30^(@)-sin^(2)60^(@)

Evaluate : 2 tan ^(2) 45^(@) + cos ^(2) 30^(@) - sin ^(2) 60^(@)

Evaluate each of the following :- 2sin^(2)30^(@)-3cos^(2)45^(@)+tan^(2)60^(@)

If tan^(2) 45^(@)-cos^(2) 60^(@)=x sin 45^(@) cos45^(@) tan 60^(@) , then find the value of x.

(4(sin^(2)60^(@)+cos^(2)60^(@)))/(tan^(2)45^(@)-cos^(2)90^(@)+sin90^(@))

Find the value of sin^(3)60^(@) cot 30^(@)-2 sec^(2) 45^(@)+3 cos60^(@) tan45^(@)-tan^(2)60^(@) .