Can someone tell me how i would sketch these graph equations???

1) Draw the graph of y= 6cos (4theta+2) for 0__<__theta__<__2pi

(where no units are included units are in radians)

2) For the graph of y= 120cos (6theta-45degrees)

What is:

a) The amplitude?

b) The period?

c) The phase shift?

Sketch the graph from general equation:

\(\displaystyle y=A sin (B\theta +C) +D\)

A is represented the amplitude of the graph (max-min value)

B: period (period=\(\displaystyle \frac{2\pi}{B}\))

C: horizontal tanslation through C unit (if the value of C is (+) the graph move to the left side and vice versa)

D:vertical tanslation through D unit (if the value of D is (+) the graph move to up side and vice versa)

===hope it'll help===(Happy)