Hello!

I'm new to the board and am stuck on these types of questions:

Referring to a graph of y = sin x or y = cos x find the exact values of x in the interval [0, 4pi] that satisfy the equation: sin x = 1/2

I know that I am looking for the values of x where the graph of sin x intersects graph of the line y = 1/2, but I don't know how to determine what those values are. I drew the graphs on the same grid, but I don't know what to do from there. Any help is greatly appreciated

*Quick note about my background: I haven't had a math class in 10+ years. My last math class was Business Calculus and I've never taken trigonometry. I passed an assessment to get into pre-caclulus (which I am in now) and now that we're on the trig section, I'm behind since it's pretty much review for everyone else and all new material for me.