Jim Kelley wrote:
The purpose of pointing out the trigonometric relationship between the
sum of sines and the product of sine and cosine was to illustrate that,
contrary to your assertion, there isn't a difference in the waves.

Jim, please go ask the head of your math department if
there's any difference in those equations. That you don't
see any difference is just extreme ignorance on your part.

Set cos(kx-wt) = cos(kx)*cos(wt) and wrestle with the
trig identities until you alleviate your ignorance.

You are extremely wrong and ignorant of mathematics.
You will realize that fact when you are unable to
prove your assertions even to yourself.

Hint: cos(kx+wt) = cos(kx)*cos(wt) - sin(kx)*sin(wt)
You are obviously missing half of the terms when you
say there "isn't a difference in the waves". (FYI,
anyone who knows anything about mathematics is laughing
at you.)
--
73, Cecil http://www.w5dxp.com