Published by:
CGP EDU Academic Team
Published on: August 12, 2026
The length of a longest interval in which the function 3 sin x – 4 sin 3 x is increasing is
A
B
C
D
π
Text Solution
Verified by ExpertsThe correct answer is:
A
Since 3 sin x –4 sin 3 x = sin 3x and sin 3x increases when 3x takes values from – 
to 
or x takes values from – 
to 
. Thus, the length of the longest interval in which 3 sin x –4 sin 3 x increases is π /6 – (– 
) = 
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