Show that `f(x)=sinx-cosx` is an increasing function on `(-pi//4,\ pi//4)` .

Show that f(x)=sin x-cos x is an increasing function on (-pi/4,pi/4)

Show that f(x)=sinx is an increasing function on (-pi//2,\ pi//2) .

Show that f(x)=cos(2x+pi//4) is an increasing function on (3pi//8,\ 7pi//8) .

Show that f(x)=cos(2x+pi/4) is an increasing function on (3 pi/8,7 pi/8)

Show that f(x)=cos(2x+(pi)/(4)) is an increasing function on (3 pi/8,7 pi/8)

Show that f(x)=tan^(-1)(sinx+cosx) is an increasing function on the interval (0,\ pi//4) .

The function f(x)=tan^(-1)(sinx+cosx) is an increasing function in (-pi/2,pi/4) (b) (0,pi/2) (-pi/2,pi/2) (d) (pi/4,pi/2)

The function f(x)=tan^(-1)(sinx+cosx) is an increasing function in (-pi/2,pi/4) (b) (0,pi/2) (-pi/2,pi/2) (d) (pi/4,pi/2)

The function f(x)=tan^(-1)(sinx+cosx) is an increasing function in (-pi/2,pi/4) (b) (0,pi/2) (-pi/2,pi/2) (d) (pi/4,pi/2)

Show that f(x) =cos (2x+(pi)/(4)) is an increasing function on ((3pi)/(8), (7pi)/(8))