Question

Sketch one cycle of the cosine function y=2 cos 2 theta

Answer 1

@dan815 can you help me with this?

Answer 2

Do you what the basic cos x function looks like?

Answer 3

Yes

Answer 4

@peachpi How does this vary from the basic cos function?

Answer 5

*cos x

Answer 6

Can you put the values of 2cos(2*0), 2cos(2*pi/4), and 2cos(2*pi/2) on a graph for me ?

Answer 7

The first value is 2, the second is 0, and the third is -2, I'm not sure how to put those on a graph?

Answer 8

Like I mean I understand how to graph them, but where would they land on the x axis?

Answer 9

Well your function is y=2cos(2*theta)
So the x axis will be in our case the theta axis.
For theta=0 , y=2
For theta=pi/4, y=0
and so on.

Answer 10

Thank you! I think I understand it

Answer 11

Anytime, and if you still have any question you can still ask :)

Answer 12

Thank you :) I might have a few more in the next little bit that confuse me (homework omgosh)

Answer 13

Can I just tag you in them?

Answer 14

Sure !