Q. Domain of $co s^{- 1} [x]$ is

3271 228 Inverse Trigonometric Functions Report Error

A

$[- 1, 2]$

19%

B

$[- 1, 2)$

37%

C

$(- 1, 2]$

12%

D

None of these

33%

Solution:

$0 \leq co s^{- 1} [x] \leq π$
$- 1 \leq [x] \leq 1$
$\Rightarrow - 1 \leq x < 2$
$\Rightarrow x \in [- 1$ , $2)$