Nothing
sinusoid<-function(amplitude,frequency,phase,...){
time<-seq(0,2*pi,pi/1000);
sinusoid<-amplitude*cos(time*frequency-phase)
par(las=1)
plot(time,sinusoid,type='l',xaxt='n',xlab='Time (radians)',ylab='',...)
lines(range(time),c(0,0),lty=2)
axis(side=1,at=c(0,pi,2*pi),font=5,labels=c('0','p','2p'))
}
#sinusoid(amplitude=1,frequency=1,phase=1)
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