NEARY: So the Gateway Arch is not a parabola but a catenary ... and I hope does know, you get a parabola if you take the equation y2=ax2a, is a constant. A catenary is a much more complicated ...

A new equation uses simple high school trigonometry ... 1// Height of the blood at the beginning of its parabolic arc, that is, when it left the body. 2// Tangent of the angle at which the first ...