diff options
Diffstat (limited to 'man3/carg.3')
| -rw-r--r-- | man3/carg.3 | 21 |
1 files changed, 10 insertions, 11 deletions
diff --git a/man3/carg.3 b/man3/carg.3 index a7e3daa..bf5003f 100644 --- a/man3/carg.3 +++ b/man3/carg.3 @@ -3,7 +3,7 @@ .\" .\" SPDX-License-Identifier: GPL-1.0-or-later .\" -.TH carg 3 2023-07-20 "Linux man-pages 6.05.01" +.TH carg 3 2023-10-31 "Linux man-pages 6.7" .SH NAME carg, cargf, cargl \- calculate the complex argument .SH LIBRARY @@ -12,7 +12,7 @@ Math library .SH SYNOPSIS .nf .B #include <complex.h> -.PP +.P .BI "double carg(double complex " z ");" .BI "float cargf(float complex " z ");" .BI "long double cargl(long double complex " z ");" @@ -21,29 +21,29 @@ Math library These functions calculate the complex argument (also called phase angle) of .IR z , with a branch cut along the negative real axis. -.PP +.P A complex number can be described by two real coordinates. One may use rectangular coordinates and gets -.PP +.P .in +4n .EX z = x + I * y .EE .in -.PP +.P where .I x\~=\~creal(z) and .IR y\~=\~cimag(z) . -.PP +.P Or one may use polar coordinates and gets -.PP +.P .in +4n .EX z = r * cexp(I * a) .EE .in -.PP +.P where .I r\~=\~cabs(z) is the "radius", the "modulus", the absolute value of @@ -52,9 +52,9 @@ and .I a\~=\~carg(z) is the "phase angle", the argument of .IR z . -.PP +.P One has: -.PP +.P .in +4n .EX tan(carg(z)) = cimag(z) / creal(z) @@ -78,7 +78,6 @@ T{ .BR cargl () T} Thread safety MT-Safe .TE -.sp 1 .SH STANDARDS C11, POSIX.1-2008. .SH HISTORY |