trig graphing

May 2010
64
0
Palmy
Please solve this question!!! cheers

For the graph y= 6cos (4theta+2) for 0<theta<2pi

What is the Phase shift????
 

pickslides

MHF Helper
Sep 2008
5,237
1,625
Melbourne
\(\displaystyle 6\cos (4\theta+2)= 6\cos 4\left(\theta+\frac{1}{2}\right)
\)
 
May 2010
64
0
Palmy
Last question i can't get.

Thanks Pickslides for helping understand these questions.

The last one i need answered is really hard i don't understand it, hope you can help.

Question 1

a) State the amplitude (A) the period (T) and the frequency (F) for the periodic function - 120sin(100 pi t)V.

b) Through how many degrees does a wheel rotate in 10 ms if its angular velocity is 8 rad/s.

c) Sketch one cycle of the given function showing the values of each variable where the curve crosses the axis. V=50sin(4.2*10^2t)