" (vili) "2sin^(2)30^(@),tan60^(@)=3cos^(3)60^(@)+sec^(3)3m

Evaluate : 2sin^(2)30^(@)tan60^(@)-3cos^(2)30^(@)sec60^(@)

Show that 2(cos^(4)60^(@)+sin^(4)30^(@))-(tan^(2)60^(@)+cot^(2)45^(@))+3sec^(2)30^(@)=1/4

Evaluate : (i) sin60^(@)*cos30^(@)-cos60^(@)*sin30^(@) (ii) tan30^(@)*cosec60^(@)+tan60^(@)*sec30^(@) .

(tan30^(@)cos ec60^(@)+tan60^(@)sec30^(@))=?

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

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

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

Prove that : (i) ((tan 60^(@)+1)/(tan 60^(@) - 1))^(2) = (1 + cos 30^(@))/(1 - cos 30^(@)) (ii) 3 "cosec"^(2) 60^(@) - 2 cot^(2) 30^(@) + sec^(2) 45^(@) = 0

Evaluate : (i) sin^(2)30^(@)-2cos^(3)60^(@)+3tan^(4)45^(@) (ii) (cos0^(@)+sin45^(@)+sin30^(@))(sin90^(@)-cos45^(@)+cos60^(@))