more maths
 

So I am completely stumped on this

"what happens when a high frequency wave combined ,h(x) with a low frequency wave l(x) with the same amplitude and phase. The resulting complex wave r(x) is the sum of two functions or r(x) = h(x) + l(x) . "


I cannot find anything in my book or the class slides on it.

Is that not just a trig function?

sin a + sin b = [ 2 sin a+b <something something>] ???

Do you have a graphics calculator? Just graph an equation of the resultant equation as Kuan describes.
If you dont have a suitable calculator, download graphmatica & use it. Its nice & simple.

well I think I need an explanation why that happens. This is for my "fundamentals of IT" class....

waste of time if you ask me.. I took the first test in 6 minutes and scored an A

it also helps if I have the calculator in radians.

Really? Trig for IT?

I took trig and pre calc for fun. Might take calc 1 as well.

The prof for this class is fresh off the boat from china. She trys hard to speak English but it doesn't work well. She also just reads from the slides. So it's an hour of class that I can teach myself sometimes.

Her wording on the homework questions is also confusing

Are you referencing OD on PP in your reports ?? :P

There are some very smart people escaping from the reds!!

Maths is a universal language !! Keep on the right side of your Prof, they are very loyal people towards those who try to help them assimilate.;)

Is that the exact wording of the problem? It's been a long time (30 years) since I took a math class, but I don't recall seeing a problem worded in that fashion. The "what happens when ..." seems vague to me. I am particularly confused by this part:Really odd punctuation.

Is there anything in the materials they gave you that further defines the term "wave"? If a wave is always stated as "h(x) = a sin(x)", or something like that, then Kuan's approach looks like a good start.

Yeah yeah. But is she hot?:D

I had a spanish prof who was fresh from Spain and needed help with english.....better not go there.

h(x) is a high frequency sine wave and l(x) is a low frequency sine wave. I'm guessing because the part A of the questions deals with Sine.