Easy ways to remember sin and cos functions of unit circle?  TOPIC_SOLVED

Trigonometric ratios and functions, the unit circle, inverse trig functions, identities, trig graphs, etc.

Easy ways to remember sin and cos functions of unit circle?

Postby paul110630 on Fri Feb 03, 2012 3:53 am

I'm new here :) hopefully I'm asking everything ok!

I have a quiz tomorrow in trigonometry, and basically you have to fill out all the sin and cosine functions of the unit circle in 5 minutes...Are there any easy ways or tricks to memorize them fast?

The quiz we took (Every kid failed in the class so we get to retake it): http://i1165.photobucket.com/albums/q590/paul110630/quiz2.jpg

As you can see i figured out most of all the values but then i ran out of time...the one things that i can't figure out is if its negative or not (well i can figure it out, but it takes to long)...any trick to that? THANKS!
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Postby stapel_eliz on Sun Feb 05, 2012 1:57 pm

There are a few methods for memorizing the special angle values. Three are covered in this lesson. :wink:
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