Sketching Trig Graphs (1 Viewer)

[cattle_7]

Ok so im stuck again.

I need to solve cos(2x + Pi/4) so that i can sketch it.
i can get it down to 1/sqrt(2)(cos2x+sin2x). But then i get stuck when trying to use the different cos2x solutions and how to simplify it down to just get it in terms of cos.

Can anyone help??

 

[studentcheese]

If you need to sketch the graph then:

firstly, draw the graph of cos2x with a period of pi, amplitude of 1
then, shift the graph pi/8 units to the left.

I think that's how u do it

 

[youngminii]

If you need to sketch the graph then:

firstly, draw the graph of cos2x with a period of pi, amplitude of 1
then, shift the graph pi/8 units to the left.

I think that's how u do it

Close.
Shift it pi/4 to the left.