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C COMPILER LIBRARY FUNCTION REFERENCE->Detailed Descriptions->asin() asinl()

Summary

#include <math.h>
    

double asin(double x)	Calculate arc sine to double precision
long double asinl(long double x)	Calculate arc sine to long double precision

Parameter
    

x	Value between 1 and 1 whose arc sine is to be calculated.

Description

These functions return the arc cosine of x.  If x is not within the range [-1...+1], the value 0.0 is returned and errno is set to EDOM.


Return

These functions return the arc sine between pi/2 and pi/2 of the value passed.