Like the stereographic projection and gnomonic projection, orthographic projection is a perspective (or azimuthal) projection, in which the sphere is projected onto a tangent plane or secant plane.
Each remaining case has a pair of secant linesa pair of identical latitudes of opposite sign (or else the equator) at which the east-west scale matches the north-south-scale.
The false position method can be faster than the bisection method and will never diverge like the secant method, but fails to converge under some naive implementations.
