Here are a few Trig problems that I am having trouble with. Any help is greatly appreciated...

-Andrew

1. How many times more intense is a 7.1 richter earthquake than a 6.2 richter quake.

R = log (I/O)

2. Evaluate the value of each indicated trig function (SHOW ALL WORK). I can do this one, but I always forget to show all of my work...

If cos(B) = 4/5, and 3pi/2 < B < 2pi... Find Cot(-B), Cos(2B), and sin(2B)

3. Answer the question by decoding the message, Show all work...

What was trig?

Message encoded using A= [2 5]

1 3

38,105,23,69,21,62,20,60,21,55,2,6,29,82,40,100,36 ,93,20,60,31,84,29,82