👉 In geometry, a "curvilinear coordinate system" is a coordinate system in which the axes of the coordinate system are inclined at an angle with respect to the horizontal. This means that the x-axis points up and down, while the y-axis goes left and right. The coordinates of each point on the plane can be expressed as follows: x = sin(θ) cos(φ) y = sin(θ) sin(φ) where θ is the angle between the x-axis and
