8.
How does t

Question

8.	
How does t

anonymous · Answer

Amplitude, phase offset, and I forgot the name of the difference between 2theta vs. theta. Anyway, |cos(a)| is at most 1. So, y will vary from [-3,3] rather than varying from [1,-1]. Also, when theta = 0, cos != 1, that is the phase offset. And it will approach values quicker, i.e., it will reach to 0 at theta = pi/4, rather than pi/2, as it happens in cos(theta)
I may be wrong, tho. Been a while since I last saw those kind of equations. :-)

anonymous · Answer

OK. Thank you:)

anonymous · Answer

Might give some insight: http://www4a.wolframalpha.com/Calculate/MSP/MSP5941a141691ig9gdege0000267bf1iicea1i892?MSPStoreType=image/gif&s=9&w=296&h=133&cdf=RangeControl and http://www4a.wolframalpha.com/Calculate/MSP/MSP20261a14145e7a934hdb000053dg889f6hfi6066?MSPStoreType=image/gif&s=55&w=296&h=131&cdf=RangeControl

experimentx · Answer

I think this better builds insight: Step 1: http://www.wolframalpha.com/input/?i=graph+y+%3Dcos%28x%29%2C+y+%3D+3cos%283x%29 Step 2: http://www.wolframalpha.com/input/?i=graph+y+%3Dcos%28x%29%2C+y+%3D+-3cos%283x%29 Step 3: http://www.wolframalpha.com/input/?i=graph+y+%3Dcos%28x%29%2C+y+%3D+-3cos%283x%2Bpi%2F4%29 Step 4: http://www.wolframalpha.com/input/?i=graph+y+%3Dcos%28x%29%2C+y+%3D+-3cos%283x+%2B+pi%2F4%29+%2B+3 You better try on your own.