Published by:
CGP EDU Academic Team
Published on: August 13, 2026
The set values of x for which the equation
cos –1 x + cos –1 
= 
holds good, is -
A
[0, 1]
B
C
D
{–1, 0, 1}
Text Solution
Verified by ExpertsThe correct answer is:
C
k = cos–1 x + cos–1 
= 
∴ –1 ≤ x ≤ 1, also 3 – 3x2 ≥ 0
–1 ≤ 
+ 
≤ 1
⇒ – 1 ≤ x ≤ 1
0 ≤ 
+ 1 + 
≤ 1
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