atan2() [7/11]

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

inline

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

The derivative with respect to the variable is

\( \frac{d}{d x} \arctan \frac{x}{c} = \frac{c}{x^2 + c^2}\).

Parameters

a	Numerator variable.
b	Denominator scalar.

Returns

The arc tangent of the fraction, in radians.

Definition at line 48 of file atan2.hpp.