cos(x) = 4/5
tan(x) = y
tan(x) = y
5.6396841983863
-0.75
0.643501108793284
0.75
x1 = -5.639684198386302 y1 = 0.75
x2 = 0.6435011087932844 y2 = 0.75
x3 = 5.639684198386302 y3 = -0.75
x4 = -13.20987172315246 y4 = -0.75
x5 = 13.20987172315246 y5 = 0.75
x5 = 13.20987172315246 y5 = 0.75