Prove that the function given by `f(x) = cos x`is(a) strictly decreasing in `(0,pi)`(b) strictly increasing in `(pi,2pi)`, and(c) neither increasing nor decreasing in `(0,2pi)`

Prove that the function given by f(x)=cos x is (a) Strictly decreasing in (0, pi) (b) Strictly increasing in (pi, 2 pi) and (c) neither increasing nor decreasing in (0,2 pi)

f(x) = cos x is strictly decreasing in (0, pi)

Show that the function given by f (x) = sinx is (a) strictly increasing in (0,pi/2) (b) strictly decreasing in (pi/2,pi) (c) neither increasing nor decreasing in (0, pi)

Prove that the function given by f(x) = cos x is (b) strictly increasing in (pi,2 pi) .

Prove that the function given by f(x)=cos xf(x)=cos x is (a) strictly decreasing in (0,pi) (b) strictly increasing in and (c) neither increasing nor decreasing in and (c) neither increasing nor decreasing in (0,2 pi)

Prove that the function f given by f(x)=log cos x is strictly decreasing on (0, (pi)/(2)) .

Show that the fucntion given by f(x) = sinx is : (a) strictly increasing in (0,(pi)/(2)) (b) strictly decreasing in ((pi)/(2),pi) (c ) neither increasing nor decreasing in (0, pi) .

Prove that the function f given by f(x)=log cos x is strictly decreasing on (0, pi/2) and strictly increasing on (pi/2, pi)

Prove that the function given by f(x) = cos x is (a) decreasing in (0, pi ) (b) increasing in (pi, 2pi) , and (c) neither increasing nor decreasing in (0, 2pi) .

Prove that the function given by f(x) = cos x is (a) decreasing in (0, pi ) (b) increasing in (pi, 2pi) , and (c) neither increasing nor decreasing in (0, 2pi) .