u - 7v + 5 = 0

u² + v² = 1

x_1=arcsin\left( \frac{4}{5}  \right)+2k π  

x_2= π -arcsin\left( \frac{3}{5}  \right) +2kπ

eq1: x - (7 * y) + 5 = 0
eq2: x^(2) + y^(2) = 1
A, B = Intersect(eq2, eq1)
O = Intersect(xAxis, yAxis)
X = Point(eq2)
k = Segment(O, A)
l = Segment(O, B)
m = Segment(X, O)
α = Angle(X, O, A)
β = Angle(X, O, B)