If `tan^2 45^@-cos^2 30^@=xsin45^@ \ cos45^@`, then `x` is (a) 2 (b) `-2` (c) `-1/2` (d) `1/2`

2sin45^(@)cos45^(@)

2sin45cos45

If y sin 45^0 cos 45^0 = tan^2 45^0 cos^2 30^0 then y =

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

If (xcos e c^2 30^0sec^2 45^0)/(8cos^2 45^0sin^2 60^0)=tan^2 60^0-tan^2 30^0, than x= (a)1 (b) -1 (c) 2 (d) 0

6cos60^(@) -sin30^(@)+sin^(2)45^@+cos^(2)45^@

Choose the correct answer in each of the following questions: If tan^(2)45^(@)-cos^(2)30^(@)=x sin45^(@) cos 45^(@) " then " x =?

Evaluate the following (i) sin 60^@ cos30^@ + sin 30^@ cos 60^@ (ii) 2tan^2 45^@ + cos^2 30^@ - sin^2 60^@ (iii) (cos45^@)/(sec30^@ + c o s e c 30^@) (iv) (sin30^@ + tan45^@ - c o s e c 60^@ )/(sec30^@ + cos60^@ +cot45^@) (v) (5cos^2 60^@ + 4sec^2 30^@ - tan^2 45^@ )/ (sin^2 30^@ + cos^2 30^@ )

4sin^(2)60^(@)+3tan^(2)30^(@)-8sin45^(@)*cos45^(@)

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