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asin(3) [netbsd man page]

ASIN(3) 						   BSD Library Functions Manual 						   ASIN(3)

NAME
asin, asinf -- arc sine function LIBRARY
Math Library (libm, -lm) SYNOPSIS
#include <math.h> double asin(double x); float asinf(float x); DESCRIPTION
The asin() and asinf() functions compute the principal value of the arc sine of x in the range [-pi/2, +pi/2]. RETURN VALUES
If |x|>1, asin(x) and asinf(x) return NaN and set the global variable errno to EDOM. SEE ALSO
acos(3), atan(3), atan2(3), cos(3), cosh(3), math(3), sin(3), sinh(3), tan(3), tanh(3) STANDARDS
The asin() function conforms to ANSI X3.159-1989 (``ANSI C89''). BSD
May 2, 1991 BSD
Man Page

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