Cos-1 (cos 7π/6) is equal to
7π/6
5π/6
π/3
π/6
If 2 tan-1 (cos x) = tan-1 (2 cosec x), then value of x is
3π/4
π/4
None of these
If tan-1 3 + tan-1 x = tan-1 8, then x =
5
1/5
5/14
14/5
A solution of the eqution tan-1 (1 + x) + tan-1 (1 - x) = π/2 is
x = 1
x = -1
x = 0
x = π
If sec-1 (1/x) + 2 sin-1(1) = π, then x equals
1/2
1
π/2
If θ = sin-1 [sin (-600o)], then one of the possible values of θ is
2π/3
-2π/3
The domain of sin-1(x) is
(-π, π)
[-1, 1]
(0, 2π)
(- ∞, ∞)
The value of cos-1 (cos 5π/3) + sin-1 (sin 5π/3) is
5π/3
10π/3
0
Tha value of cot-121 + cot-113 + cot-1(-8) is
cot-126
cot-11
The value of sin (2 sin-1 0.8) is
0.96
0.48
0.64
