.BG
.VE $Header: /usr3/s/current/s/.help/RCS/cos,v 1.2 83/12/30 19:26:38 rab Exp $
.FN cos
.FN sin
.TL
cos sin: Trigonometric Functions
.CS
sin(x)
cos(x)
.PP
.AG x
numeric structure, in radians.  Missing values (NAs) are
allowed.
.RT
structure with data transformed by function.
.KW basic*
.KW trig
.KW math
.WR
