Name:
atan
the arctangent function.
Library names:
sollya_obj_t sollya_lib_atan(sollya_obj_t)
sollya_obj_t sollya_lib_build_function_atan(sollya_obj_t)
#define SOLLYA_ATAN(x) sollya_lib_build_function_atan(x)
Description:
- atan is the inverse of the function tan: atan(y) is the unique number
x in [-Pi/2; Pi/2] such that tan(x)=y.
- It is defined for every real number y.
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