Question

How do you graph `y=cos(x+pi/2)`?

Answer 1

graph{cos(x+(pi/2)) [-10, 10, -5, 5]}

Explanation:

graph{cos(x) [-7.9, 7.904, -3.95, 3.95]}

you just shift the cos(x) graph by `pi/2` to the left

graph{cos(x+(pi/2)) [-10, 10, -5, 5]}