Question

Draw the curve of $y=\cos x$ between $x=0$ and $x=2\pi$ .

Answer 1

The graph of $cosx$ is shown in image

at $x=0,cosx=1$

At $x=\frac{\pi }{2},cosx=0$

at $x=\pi ,cosx=-1$

And at $x=2\pi ,cosx=1$