how do you figure out if you should use cos sin or tan in Trigonometry

Someone answered a question like this the other day. Here's the link to that answer:

http://web2.0calc.com/questions/how-do-i-know-when-to-use-tan-instead-of-sin-or-cos-when-i-think-i-ve-got-it-right-by-using-sin-or-cos-i-ve-really-got-it-wrong-because-i

Hopefully that helps. If it doesn't I'm sure someone else on the forum can explain this to you.

Thanks for dragging that post out Ninja 

No problem. The reference material page does have a use after all! :)

Thank you really helpful and explained a lot