The given functions are

The red graph represents the 1st function
The blue graph represents the 2nd function
They intersected at point (43.4 degrees, 0.192)
There is only one point of intersection between the 2 graphs
The answer is

To find the points on the red graph
Substitute x by 0, 90 degrees (pi/2), 180 degrees (pi), and 270 degrees (3/2pi)