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

1 Answer
Feb 20, 2018

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


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.
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