atan2() [6/11]

var stan::math::atan2 ( const var &  a, const var &  b  )

inline

Return the principal value of the arc tangent, in radians, of the first variable divided by the second (cmath).

The partial derivatives are defined by

\( \frac{\partial}{\partial x} \arctan \frac{x}{y} = \frac{y}{x^2 + y^2}\), and

\( \frac{\partial}{\partial y} \arctan \frac{x}{y} = \frac{-x}{x^2 + y^2}\).

Parameters

a	Numerator variable.
b	Denominator variable.

Returns

The arc tangent of the fraction, in radians.

Definition at line 27 of file atan2.hpp.