1. ## Trig graphing

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?

2. Originally Posted by GAVREED2
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===