Find the extrema of the function: `f(x) = 2sin(2x) + sin(x) - cos(x)`

Find the period of the function f(x) = (sin x + sin 3x)/(cos x + cos 3x)

Find the maximum value of the function f(x) =sin x + cos x .

Find the maximum value of the function f(x) =sin x + cos x .

The function f(x) = sin x + cos x will be

The period of the function f(x) = | sin 2x | + | cos 8x | is

Find the absolute extrema of the function f(x)=3 cos x on the closed interval [0,2pi] .

Find the interval of decrease of the function f(X) = sin x - 2x

Show that the range of the function f(x ) = (sin^(2) x + cos^(4) x)/( cos^(2) x+ sin^(4) x ) is a singleton set.

Find the period of the function sin^(2)x + 2cos^(2)x .

The range of the function f(x)=2|sin x|-3|cos x| is