Name:
acos
the arccosine function.
Library names:
sollya_obj_t sollya_lib_acos(sollya_obj_t)
sollya_obj_t sollya_lib_build_function_acos(sollya_obj_t)
#define SOLLYA_ACOS(x) sollya_lib_build_function_acos(x)
Description:
- acos is the inverse of the function cos: acos(y) is the unique number
x in [0; Pi] such that cos(x)=y.
- It is defined only for y in [-1; 1].
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