asinl man page on MacOSX

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```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 [-π/2, +π/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);

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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