asin man page on 4.4BSD

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[printable version]

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

NAME
asin — arc sine function

SYNOPSIS
#include <math.h>

double
asin(double x);

DESCRIPTION
The asin() function computes the principal value of the arc sine of x.  A
domain error occurs for arguments not in the range [-1, +1].  For a dis‐
cussion of error due to roundoff, see math(3).

RETURN VALUES
The asin() function returns the arc sine in the range [-π/2, +π/2] radi‐
ans.  On the VAX, and Tahoe , if:

|x| > 1

the global variable errno is set to EDOM and a reserved operand fault
generated.

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 ANSI X3.159-1989 (“ANSI C89”).

BSD				 June 4, 1993				   BSD
```
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