asin(3) BSD Library Functions Manual asin(3)
NAME
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
Mac OS X 10.9.1 - Generated Mon Jan 6 19:01:40 CST 2014