The value of `(1-tan^2 15^@)/(1+tan^2 15^@)` is (A) 1 (B) `sqrt(3)` (C) `sqrt(3)/2` (D) 2

The value of (1-tan^(2)15^(@))/(1+tan^(2)15^(@))=(A)1(B)sqrt(3) (C) (sqrt(3))/(2)(D)2

The value of (1-tan^2 15^0)/(1+tan^2 15^0)= 1 b. sqrt(3) c. (sqrt(3))/2 d. 2

tan 75^(@)+ tan 15^(@)= A)1B)2C)3D)4

The value of sin^(2)75^(@)-sin^(2)15^(0) is 1/2 b.sqrt(3)/2 c.1 d.0

The value of tan 45^@ (A) sqrt3 (b) frac(sqrt3)(2) (C) frac(1)(sqrt3) (D) 1

What is the value of (tan 9^(@) tan 23^(@) tan 60^(@) tan67^(@) tan 81^(@))/("cosec"^(2)72^(@)+cos^(2)15^(@)-tan^(2)18^(@)+cos^(2)75^(@))? (a) (1)/(2 sqrt(3)) (b) (sqrt(3))/(2) (c) (1)/(sqrt(3)) (d) 2 sqrt(3)

The value of tan{cos^(-1)(1)/(5sqrt(2))-sin^(-1)(4)/(sqrt(17))} is (sqrt(29))/(3)( b) (29)/(3)(c)(sqrt(3))/(29) (d) (3)/(29)]}

tan15^(@)=2-sqrt(3)

Let y=1/(2+1/(3+1/(2+1/(3+)))) , then the value of y is (a)(sqrt(13)+3)/2 (b) (sqrt(13)-3)/2 (c)(sqrt(15)+3)/2 (d) (sqrt(15)-3)/2