Unit Circle - QR

[Auntymarkovnikov]

Should you memorize the unit circle for the QR section? I have 0% of it memorized and I hope to keep it that way unless it is helpful to know it for the exam.
Also, are there any tricks/hints to memorizing it ?

 

[Pearl E. White]

Just memorize the first quadrant! The rest are the same values with perhaps a sign change (positive to negative) etc. If you need more help, let me know.

 

[ThirdMolarz]

Just discovered Khan Academy today and remembered your post. Only having watched 2 videos so far, I already learned that circumference equals 2 pi r because there are 2 pi radiuses in a circle. A radian is a radius how did I not know this?! Anyway, I think this will help you better understand stuff on QR haha. Good luck!

The unit circle definition of sine, cosine, and tangent | Khan Academy

 

[Auntymarkovnikov]

My mannnn thank you!
@ThirdMolarz