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  /src/lib/libm/noieee_src/
n_asincos.c 95 __weak_alias(acos, _acos)
121 /* ACOS(X)
136 * acos(x) = 2*atan2( / -------- , 1 ) .
146 * acos(x) returns (PI/pi) * (the exact arc cosine of x) nearly rounded;
162 * 2.07 ulps. (comparing against (PI/pi)*(exact acos(x)));
166 * acos(x) returns the exact acos(x) with error below about 2 ulps.
174 acos(double x) function in typeref:typename:double
190 return (float)acos(x);
  /src/include/
tgmath.h 131 #define acos(a) __TG_COMPLEX((a), acos) macro
  /src/lib/libm/src/
namespace.h 3 #define acos _acos macro

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