#Mark the correct alternative in each of the following
At 
f(x) = 2sin 3x + 3 cos 3x is
f’(x)=0
⇒6 cos 3x – 9 sin 3x = 0
⇒6 cos 3x = 9 sin 3x
So, at 
neither is maximum nor minimum
Option(D)
1
#Mark the correct alternative in each of the following
At f(x) = 2sin 3x + 3 cos 3x is
f’(x)=0
⇒6 cos 3x – 9 sin 3x = 0
⇒6 cos 3x = 9 sin 3x
So, at neither is maximum nor minimum
Option(D)