Question

How do you graph `y=5cos(1/2x)`?

Answer 1

By trying different x values you can get it

Explanation:

If `x=0` your function `y=5`
If `x=pi/2` your function `y=4.62`
et cetera...
If `x=pi` your function `y=0` and then you can plot

graph{5cos(0.5x) [-10, 10, -6, 6]}