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" What tan "^(2)45" t "cos^(2)50^(@)-sin...

" What tan "^(2)45" t "cos^(2)50^(@)-sin^(2)60^(@)

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

Prove that : (4)/(3) tan ^(2) 30^(@) + sin ^(2) 60^(@) - 3 cos ^(2) 60^(@) + (3)/(4) tan^(2) 60^(@) - 2 tan^(2) 45^(@) = (25)/(36)

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

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

3sin^(2)30^(@)+2cos^(2)45^(@)+3tan^(2)60^(@)=

(kcosec^(2)30^(@).sec^(2)45)/(8cos^(2)45^(@).sin^(2)60^(@))=tan^(2)60^(@)-tan^(2)30^(@) , then k = ?

If x sin 45^(@) cos^(2)60^(@)=(tan^(2)60^(@) cosec 30^(@))/(sec 45^(@) cot^(2) 30^(@)) then x