`cos 45^@ cos60^@-sin45^@ sin60^@ = sqrt(3-1)/(2sqrt2).`

cos45^(@)cos60^(@)-sin45^(@)sin60^(@)=(sqrt(3)-1)/(2sqrt(2))

Evaluate: cos 45 cos 60 - sin 45 sin 60

sin45^@*cos45^@+sqrt3sin60^@ = …………..

frac(cos60^@ + sin 60^@)(cos60^@- sin 60^@) is equal to (A) -(sqrt3 +2) (B) -1 (C ) (sqrt3 -2) (D) (sqrt3 + 2)

sin 45^@.cos 45^@ + sqrt 3 sin 60^@ =…………

Prove that (cos45^(@)-cos75^(@))/(sin45^(@)+sin75^(@))=2-sqrt3

The value of (sin 30^@ sin 60^@)/(cos 60^@ cos 30^@)-tan45^@ is : (sin 30^@ sin 60^@)/(cos 60^@ cos 30^@)-tan45^@ का मान है?

The value of (sin 30^@-cos 60^@+ cot^2 45^@)/(cos 30^@-tan 45^@+sin 90^@) is equal to : (sin 30^@-cos 60^@+ cot^2 45^@)/(cos 30^@-tan 45^@+sin 90^@) का मान किसके बराबर है?

((cos30^(@)+sin60^(@))/(1+cos60^(@)+sin30^(@)))=(sqrt(3))/(2)