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asin(3) [netbsd man page]

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

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

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

asin -- arc sine function SYNOPSIS
#include <math.h> double asin(double x); long double asinl(long double x); float asinf(float x); DESCRIPTION
The asin() function computes the principal value of the arc sine of x. The result is in the range [-pi/2, +pi/2]. SPECIAL VALUES
asin(+-0) returns +-0. asin(x) returns a NAN and raises the "invalid" floating-point exception for |x| > 1. VECTOR OPERATIONS
If you need to apply the asin() function to SIMD vectors or arrays, using the following functions provided by the Accelerate.framework may give significantly better performance: #include <Accelerate/Accelerate.h> vFloat vasinf(vFloat x); void vvasinf(float *y, const float *x, const int *n); void vvasin(double *y, const double *x, const int *n); SEE ALSO
acos(3), atan(3), atan2(3), cos(3), cosh(3), sin(3), sinh(3), tan(3), tanh(3), math(3) STANDARDS
The asin() function conforms to ISO/IEC 9899:2011. BSD
December 11, 2006 BSD
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