Find the intervals in which the function `f` given `f(x)=\ s in x+cosx ,\ 0lt=x\ lt=2pi,\ ` is strictly increasing or strictly decreasing.

Find the intervals in which the function f given f(x)=\ sin x-cosx ,\ 0lt=x\ lt=2pi,\ is strictly increasing or strictly decreasing.

Find the intervals in which the function f given by f(x)=sin x-cos x, 0 lt x lt 2 pi is strictly increasing or strictly decreasing.

Find the intervals in which the function f given by f(x)=sin x+cos x,quad 0<=x<=2 pi is strictly increasing or strictly decreasing.

Find the intervals in which the function f given f(x)=sin x+cos x,0<=x<=2 pi, is strictly increasing or strictly decreasing.

Find the intervals in which the function 'f' given by : f(x)=sinx-cosx, 0lexle2pi is strictly increasing or striclty decreasing.

Example 13 Find the intervals in which the function f tives f(x)=sin x+cos x,0<=x<=2pi is strictly increasing or strictly decreasing.

Find the intervals in which the function f(x) = sin x +cos x,x in [0, 2pi] is (i) strictly increasing, (ii) strictly decreasing.

Find the interval in which the function f given by f(x)=sin2x+cos2x,0<=x<=pi is strictly decreasing.

Find the intervals in which the function f given by f(x) = tan x -4x , x in ( 0,(pi) /(2) ) is (a) Strictly increasing (b ) strictly decreasing

Find the intervals in which f(x)=sinx-cosx , where 0ltxlt2pi , is strictly increasing or decreasing.