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ASIN (3) | C library functions | Unix Manual Pages | :man

NAME

asin, asinf - arc sine functions

CONTENTS

Library
Synopsis
Description
Return Values
See Also
Standards

LIBRARY


.Lb libm

SYNOPSIS


.In math.h double asin "double x" float asinf "float x"

DESCRIPTION

The asin and the asinf functions compute the principal value of the arc sine of x. A domain error occurs for arguments not in the range [-1, +1]. For a discussion of error due to roundoff, see math(3).

RETURN VALUES

The asin and the asinf functions return the arc sine in the range
.Bk -words [-pi/2, +pi/2]
.Ek radians. If:

| x | > 1

asin x raises an invalid exception and returns an NaN.

SEE ALSO

acos(3), atan(3), atan2(3), cos(3), cosh(3), fenv(3), math(3), sin(3), sinh(3), tan(3), tanh(3)

STANDARDS


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