Can someone help explain sec, csc, and cot? Pre-calculus help.?

Nick

New member
I'm in pre-calculus and I have a test tomorrow on secant, cosecant, and cotangent. I was absent for a while and had trouble getting caught up and didn't realize it until tonight.

How do you find those when given an angle?

For example,

How would you find

sec39 degrees

cot173 degrees

csc191 degrees

Also, this was an example problem given, but I have no Idea how to get it.

T2: Sketch an angle of 120 degrees in standard position. Show the reference angle and it's measure. Find the exact values of the six trigonometric functions of 120 degrees.
If sin=?3/2, would csc be 2?3/3?
 
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