The value of `tan75^@` is
`(a) (sqrt(3)+1)/(sqrt(3)-1)`
`(b) (sqrt(3)-1)/(sqrt(3)+1)`
`(sqrt(5)+1)/(4)`
`(d) (sqrt(5)-1)/(4)`

(1)/(4sqrt(3)-3sqrt(5))

The value of sin(1/4sin^(-1)(sqrt(63))/8) is 1/(sqrt(2)) (b) 1/(sqrt(3)) (c) 1/(2sqrt(2)) (d) 1/(3sqrt(3))

The value of cos48cos12 (A) (sqrt(5)+3)/(8) (B) (3-sqrt(5))/(2) (C) (sqrt(5)+1)/(4) (D) (sqrt(5)-1)/(4)

Find a and b when (sqrt3 -1)/(sqrt3 +1) +(sqrt3 +1)/(sqrt3 -1) = a+sqrt3 b

Find the value of tan^(-1)sqrt(3)-cot^(-1)-sqrt(3)

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

(1)/(sqrt(2)+sqrt(3)-sqrt(5))+(1)/(sqrt(2)-sqrt(3)-sqrt(5))

12.Rationalise and find the value of' "a'" and "'b'" ; (i) "(sqrt(3)-1)/(sqrt(3)+1)=a+b sqrt(3), (ii) (sqrt(5)-2)/(sqrt(5)+2)=a+b sqrt(5)

If a=(sqrt(3)+1)/(sqrt(3)-1) and b=(sqrt(3)-1)/(sqrt(3)+1) ,find the value of a^(2)+ab-b^(2)

Simplify: (1)/(1+sqrt(2))+(1)/(sqrt(2)+sqrt(3))+(1)/(sqrt(3)+sqrt(5))