1/x+ 1/y+1/z
xyz
xy+yz+zx
None of these
The value of sin-11/2 is
-π/6
π/6
π/3
-π/3
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
If cos-1 x + cos-1 y = π what is the value of sin-1x + sin-1y ?
0
π/2
π
2π
π/4
-3π/4
If sin-1 (1-x)+ 2 sin-1 x = π/2, then x equals
{0,-1/2}
{1/2,0}
{0}
{-1,0}
If cos-11/2 =A, then cos A = ___________________
1/2
1
2
tan-1√3 - cot-1 (-√3) is equal to
-π/2
2√3
Sin-1 4/5 + 2 tan-1 1/3 =
