What is the period of #f(t)=sin( t / 7 )+ cos( (t)/21 ) #?
the period for the sum is the
nice Leland!...it's the same as a polyrhythm in music....LCMs are SO important!! If one musician is playing in one meter and a second musician is playing in another meter, you can manipulate all manner of LCMs for the sake of polyrhythms.
Here is a pretty TI screenshot to support the results.