# What to do with trig functions?

• Feb 26th 2013, 06:25 AM
alexpasty2013
What to do with trig functions?
Hi could anyone direct me to a good text/vid or explain some things to me?

My course has gone to great lengths to explain all about the basic trig functions, sin being opp over hyp etc, but so far it has left out what you do with these functions, how to use them etc.

If I have opp = 30cm and hyp = 80cm and I divide them and I am left with 0.375 or whatever it is. Great. So sin = 0.375. Wonderful. Glad to know that. Now what!

The text does not explain what my 0.375 relates to, or what it is for? My angle is not 0.375 that does not sound right, the adj is not 0.375 either. What am I to do with my 0.375?
• Feb 26th 2013, 07:36 AM
HallsofIvy
Re: What to do with trig functions?
Quote:

Originally Posted by alexpasty2013
Hi could anyone direct me to a good text/vid or explain some things to me?

My course has gone to great lengths to explain all about the basic trig functions, sin being opp over hyp etc, but so far it has left out what you do with these functions, how to use them etc.

Did it not say sine of what was "opp over hyp"? Did it not say what "opp" meant?

Quote:

If I have opp = 30cm and hyp = 80cm and I divide them and I am left with 0.375 or whatever it is. Great. So sin = 0.375. Wonderful. Glad to know that. Now what!