trigonometry laws and identities sheet (free printable, plus the page explains the concepts)
Trigonometry Definition Math Reference Sheet (1 page PDF)
"All Students Take Calculus" Once students understand why different trig functions are positive in some quadrants and negative in others, this is a quick visual way to remember which is which!
Trigonometry Poster More
Calculus for Beginners and Artists is an online textbook that provides an overview of Calculus in clear, easy to understand language designed for the non-mathematician. Thank you MIT OpenCourseWare for awesome, free resources and classes!!!
A useful way to remember sin(30), sin(45), sin(60): think "1, 2, 3"; cos(30), cos(45), cos(60): think "3, 2, 1" | www.mathisfun.com
I know this makes sense but I'm damned if I know why. When I come across stuff like this it makes want to learn more.
Radian Circle with Coordinates | Wednesday (1/25) - Solving Identities using the Conjugate
Flocabulary - Pythagorean Theorem
Math = Love: Unit 3: Trig Ratios and the Unit Circle INB Pages