Question

How do you find the intersections points of `y=-2cosx` and `y=3sin(3x)`?

Answer 1

Generate graphs of the functions and find their points of intersection.

Explanation:

As this question is in the "Graphing Trigonometric Functions" section, I assume that the graphical solution is preferred over the numerical one of `-2cos(x) = 3sin(3x)`. You can expand a graph scale to find individual solution points. As both functions are continuous there are an infinite number of intersections.