Find the intervals in which `f(x)=s in3xcos3x ,0

Find the intervals in which f(x)=sin3x cos3x,0

Find the intervals in which f(x)=s in x(1+cosx), 0

Find the intervals in which : f(x) sin 3x - cos 3x, 0 < x < pi , is strictly increasing or strictly decreasign.

Find the intervals in which f(x) = sin 3x – Cos 3x, 0 < x < pi , is strictly increasing or decreasing.

Find the intervals in which f(x) = sin 3x, x in [0,pi/2] is (i) increasing, (ii) decreasing.

Find the intervals in which f(x) = sin 3x, x in [0,pi/2] is (i) increasing, (ii) decreasing.

Find the intervals in which f(x) = 2x^(3) - 9x^(2) - 12 x -3 is increasing and the intervals in which f(x) is decreasing.

For the function f(x) = 2x^3-8x^2+10x+5 , find the interval (s) in which f(x) is increasing

Find the intervals in which f(x) =x^(3)-2x^(3) -4x +7 is increasing