asin() Mathematics Function asin() Calculate inverse sine #include <math.h> double asin(arg) double arg; asin calculates the inverse sin of arg, which must be in the range [-1., 1.]. The result will be in the range [-P/2, P/2]. ***** Example ***** For an example of this function, see the entry for acos. ***** See Also ***** mathematics library ***** Diagnostics ***** Out-of-range arguments set errno to EDOM and return zero. COHERENT Lexicon Page 1