`6cos^3x+cos^2x-1=0`

Find the intervals in which the function f(x) =3 cos^(4)x+10 cos^(3)x+ 6cos^(2)x-3(0 le x le pi) is monotonically increasing or decreasing.

Separate the intervals of monotonocity for the function f(x)=3cos^4x+10cos^3x+6cos^2x-3,x in [0,pi]

Separate the intervals of monotonocity for the function f(x)=3cos^4x+10cos^3x+6cos^2x-3,x in [0,pi]

Separate the intervals of monotonocity for the function f(x)=3cos^4x+10cos^3x+6cos^2x-3,x in [0,pi]

Separate the intervals of monotonocity for the function f(x)=3cos^4x+10cos^3x+6cos^2x-3,x in [0,pi]

Separate the intervals of monotonocity for the function f(x)=3cos^(4)x+10cos^(3)x+6cos^(2)x-3,x in[0,pi]

The interval in which f(x)=3cos^(4)x+10cos^(3)x+6cos^(2)x-3 increases or decreases in (0,pi)

The interval in which f(x)=3cos^(4)x+10cos^(3)x+6cos^(2)x-3 increases or decreases in (0,pi)

The interval in which f(x)=3cos^(4)x+10cos^(3)x+6cos^(2)x-3 increases or decreases in (0,pi)

cos 3x + cos x - cos 2x =0