If 4`alpha` = `(180^( @ ) )` , then find Sin`( alpha )`
( A ) `1/sqrt3`
( B ) `1/2`
( C )` 1/sqrt2 `
( D ) `sqrt3/2`

Sin (A + B) = 1/(sqrt2) Cos(A - B) = (sqrt3)/2

(sqrt8)^(1/3) = ? (a) 2 (b) 4 (c) sqrt2 (d) 2sqrt2

The value of cos (1110^@) is A. sqrt3//2 B. 1//2 C. 1//sqrt2 D. 1

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

Let (z-alpha)/(z+alpha) is purely imaginary and |z|=2, alpha in RR then alpha is equal to (A) 2 (B) 1 (C) sqrt2 (D) sqrt3

Delta ABC has a right angle at A. If BC = sqrt2 and AB = AC = 1 then sin B is equal to (a) (1)/(sqrt2) (b) sqrt2 (c) (sqrt3)/(2) (d) sqrt3

The value of sin 60 is: A. sqrt 1//2 B. sqrt 3//2 C. 1//sqrt 2 D. sqrt""1//sqrt""2

Evaluate : 1/( 1 + sqrt (2) ) + 1/( sqrt(2) + sqrt (3) ) + 1/ ( sqrt(3) + sqrt (4) )

2sin 60^(@)-cos180^(@)+(1//3)sin270^(@)= A) sqrt2+(3)/(2) B) sqrt3+(2)/(3) C) sqrt2-(3)/(2) D) sqrt3-(2)/(3)

If tanalpha=(sqrt(3)+1)/(sqrt(3)-1) , then the expression cos 2alpha +(2+sqrt(3))sin 2alpha is