.TH cos() "" "" "Mathematics Function (libm)"
.PC "Calculate cosine"
.B "#include <math.h>"
\fBdouble cos(\fIradian\^\fB) double \fIradian\^\fB;\fR
.PP
.B cos()
calculates the cosine of its argument
\fIradian\fR, which must be in radian measure.
.SH Example
For an example of this function, see the entry for
.BR sin() .
.SH "See Also"
.Xr "acos()," acos
.Xr "cosh()," cosh
.Xr "libm" libm
.br
\*(AS, \(sc7.5.2.5
.br
\*(PX Standard, \(sc8.1
