Show that `f(x)=cos^2x` is decreasing function on `(0,pi/2)dot`

Show that f(x)=cos^(2)x is a decreasing function on (0,pi/2)

Show that f(x)=cos^(2)x is decreasing function on (0,(pi)/(2))

Show that f(x)=cos^2x is a decreasing function on (0,\ pi//2) .

Show that f(x)=1/x is decreasing function on (0,oo)dot

Show that f(x)=cosx is decreasing function on (0,pi), increasing in (-pi,0) and neither increasing nor decreasing in (-pi,pi)dot

Show that f(x)=cos x is decreasing function on (0,pi), increasing in (-pi,0) and neither increasing nor decreasing in (-pi,pi) .

Show that f(x)=cos x is a decreasing function on (0,pi), increasing in (pi,0) and neither increasing nor decreasing in (pi,pi) .

Show that f(x)=x^2-xsinx is an increasing function on (0,pi/2)dot

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

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