" What will be the interval in which "f(x)=sin x+cos x,x in[0,(pi)/(2)]" is increasing "

Write the interval in which f(x)=sin x+cos x,x in[0,pi/2] is increasing.

Find the interval in which f(x) = sinx + cos x. [x in [0, 2 pi]] increases.

Find the interval where the function f(x) = sin x + cos x, x in [0, 2pi] is increasing.

The interval in which the function f(x)=sin x+cos x in x in[0,2 pi] is

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 interval (s) in which the function f(x) = sin x + cos x, x in (0, pi//2) is increaing or decreasing.

Find the interval(s) in which f(x)= cos(2x+(pi)/(4)), 0 le x le pi is increasing.