Sin (Sec-1 25/7) =
24/25
28/25
26/25
22/25
None of these
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
x/2
2x
3x
x
Sin-1 (-x)=
Cos x
-Sin-1 x
Sin-1 x
sin-1(sin5π/6)=_____________
5π/6
2π/6
3π/6
π/6
1/x+ 1/y+1/z
xyz
xy+yz+zx
π/2
-π
π
-π/2
The value of cot-1(-√3) is
-π/6
-5π/6
