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Manpages ASINSection: Linux Programmer's Manual (3 )Updated: 1993-06-08 Index Return to Main Contents NAMEasin - arc sine functionSYNOPSIS#include <math.h> double asin(double x); DESCRIPTIONThe asin() function calculates the arc sine of x; that is the value whose sine is x. If x falls outside the range -1 to 1, asin() fails and errno is set.RETURN VALUEThe asin() function returns the arc sine in radians and the value is mathematically defined to be between -PI/2 and PI/2 (inclusive).ERRORS
CONFORMING TOSVID 3, POSIX, BSD 4.3, ISO 9899SEE ALSOacos(3), atan(3), atan2(3), cos(3), sin(3), tan(3)
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