Question

graph y = (‑3)*​cos(​1/​2*​x)

Answer 1

i just need the x-intercepts, minima, and maxima

Answer 2

Okay, x-intercepts first then.
\[-3\cos(\frac{ x }{ 2 }) = 0\]
So the first thing I would ask is when does cos = 0?

Answer 3

...umm idk

Answer 4

this may help you as well
http://openstudy.com/study#/updates/520333b5e4b01402cba83e77

Answer 5

So cosine refers to x-values. So do you know what the points are on that circle where x = 0?