diff options
Diffstat (limited to 'lib/msun/man/atan.3')
| -rw-r--r-- | lib/msun/man/atan.3 | 31 |
1 files changed, 16 insertions, 15 deletions
diff --git a/lib/msun/man/atan.3 b/lib/msun/man/atan.3 index 2c2bd64..ef119f1 100644 --- a/lib/msun/man/atan.3 +++ b/lib/msun/man/atan.3 @@ -28,12 +28,13 @@ .\" from: @(#)atan.3 5.1 (Berkeley) 5/2/91 .\" $FreeBSD$ .\" -.Dd May 2, 1991 +.Dd July 31, 2008 .Dt ATAN 3 .Os .Sh NAME .Nm atan , -.Nm atanf +.Nm atanf , +.Nm atanl .Nd arc tangent functions of one variable .Sh LIBRARY .Lb libm @@ -43,21 +44,18 @@ .Fn atan "double x" .Ft float .Fn atanf "float x" +.Ft long double +.Fn atanl "long double x" .Sh DESCRIPTION The -.Fn atan -and the -.Fn atanf +.Fn atan , +.Fn atanf , +and +.Fn atanl functions compute the principal value of the arc tangent of .Fa x . -For a discussion of error due to roundoff, see -.Xr math 3 . .Sh RETURN VALUES -The -.Fn atan -and the -.Fn atanf -function returns the arc tangent in the range +These functions return the arc tangent in the range .Bk -words .Bq -\*(Pi/2 , +\*(Pi/2 .Ek @@ -75,6 +73,9 @@ radians. .Xr tanh 3 .Sh STANDARDS The -.Fn atan -function conforms to -.St -isoC . +.Fn atan , +.Fn atanf , +and +.Fn atanl +functions conform to +.St -isoC-99 . |
