* Fixed infinite recursion in atan2_evalf() and improved atan2_eval().
* Added automatic evaluations for trigonometric functions with negative
arguments (e.g. sin(-2) -> -sin(2)).
* Fixed a static initialization order goof-up.
* Fixed infinite recursion in atan2_evalf() and improved atan2_eval().
* Added automatic evaluations for trigonometric functions with negative
arguments (e.g. sin(-2) -> -sin(2)).
* Fixed a static initialization order goof-up.