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
Sin-1 x + sin-1 2x = π/3, then x is
π/2
π/3
π/4
-3π/4
The value of tan-1√3-sec-1(-2) + cosec-1(2/√3) is __________.
0
1
-π/2
1/x+ 1/y+1/z
xyz
xy+yz+zx
None of these
If sin-1 (1-x)+ 2 sin-1 x = π/2, then x equals
{0,-1/2}
{1/2,0}
{0}
{-1,0}
Sin(π/3 - sin-1 (-1/2) is equal to
1/2
1/3
1/4
Sin-1 (-x)=
Cos x
-Sin-1 x
Sin-1 x
tan-1√3 - cot-1 (-√3) is equal to
π
2√3
Sin (Sec-1 25/7) =
24/25
28/25
26/25
22/25
