Pythagorean theorem (arbitrary triangle - obtuse angle)
Area Moment of Inertia - Filled Ellipse
Pell's equation
Geosynchronous orbit
Spectral Exitance (real surface)
Parametric equation 2-variable type (x-axis)
Polar Moment of Area - Annulus Cross Section
Youden's J statistic
Magic square
Acceleration of reciprocating piston with respect to crank angle