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)