Q. The domain of $cos^{- 1} 2 x$ is

3349 226 Inverse Trigonometric Functions Report Error

A

[-1, 1]

20%

B

[-1/2, 1/2]

42%

C

[0, 1/2]

36%

D

(1, 1/2)

2%

Solution:

$0 \leq 2 x \leq 1 \Rightarrow 0 \leq 2 x \leq 1 \Rightarrow 0 \leq x \leq 1/2$