Published by:
CGP EDU Academic Team
Published on: August 13, 2026
The value of x for which cos –1 (cos 4) > 3 x 2 – 4 x , is -
A
B
C
(–2, 2)
D
Text Solution
Verified by ExpertsThe correct answer is:
D
cos –1 (cos 4) = cos –1 {cos (2 π – 4)} = 2 π – 4
∴ cos –1 (cos 4) > 3 x 2 – 4 x
⇒ 2 π – 4 > 3 x 2 – 4 x
⇒ 3 x 2 – 4 x – (2 π – 4) < 0
⇒ 
.
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