asin, asinf - arc sine functions

CONTENTS

Library
Synopsis
Description
Return Values
See Also
Standards

.Lb libm

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

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).

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.

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

The asin function conforms to -isoC.

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