is equal to
cos-1 (cos x) = x is satisfied by
x∈ R
x∈ [-1, 1]
None of these
The value of is
The formula holds only for
| x | ≤ 1
x ∈ (-1,1]
x∈[1, ∞ )
0
1
sec-1 ( sin x ) is real , if
x ∈ ( - ∞, α )
x ∈ [ -1, 1 ]
x = ( 2n + 1 ) π/2, n ∈ I
x = n π, n ∈ I
, When x > 0, then x is equal to ______.
3
-2/3
The formula holds for
x ∈ [0,1]
x ∈ (-1,0)
Solution of the equation?tan-1 (x -1 ) + tan -1x + tan -1 ( x + 1 ) = tan -1 3x is
x = 0
x= ± 1/2
x = ± 1/3
