Let f(x)= sec-1x + tan-1x. Then f(x) is real for
x∈[-1,1]
x∈R
x∈N
x∈ (-∝,-1) ∪(1, +∝)
If Sin-1 x = π/5 for some x∈ [-1, 1] then the value of Cos-1 x is
3π/10
5π/10
7π/10
9π/10
tan-1√3 - cot-1 (-√3) is equal to
π
-π/2
0
2√3
If sin-1 (1-x)+ 2 sin-1 x = π/2, then x equals
{0,-1/2}
{1/2,0}
{0}
{-1,0}
The value of sin-1 1/2 is
-π/6
π/6
π/3
-π/3
If cos-1 x + cos-1 y = π what is the value of sin-1x + sin-1y ?
π/2
2π
Sin (Sec-1 25/7) =
24/25
28/25
26/25
22/25
Sin(π/3 - sin-1 (-1/2) is equal to
1/2
1/3
1/4
1
What is the value of x that satisfies the equation cos-1 x= 2 sin-1 x ?
√3/2
6/7
6/√13
√13/5
17/6
