Question

How do you graph `y = -3 cos x`?

Answer 1

For a general cosine trigonometric function of form `y=acosbx`, a represents the amplitude ie the maximum displacement from the x-axis, and the period, ie distance on the x-axis for 1 complete cycle, is given by `(2pi)/b`

So in this case, a=-3 and period is `2pi`

Hence graph looks like the following :

graph{-3cosx [-10, 10.005, -5, 4.995]}