Educator®

Please sign in to participate in this lecture discussion.

Resetting Your Password?
OR

Start Learning Now

Our free lessons will get you started (Adobe Flash® required).
Get immediate access to our entire library.

Membership Overview

  • Available 24/7. Unlimited Access to Our Entire Library.
  • Search and jump to exactly what you want to learn.
  • *Ask questions and get answers from the community and our teachers!
  • Practice questions with step-by-step solutions.
  • Download lecture slides for taking notes.
  • Track your course viewing progress.
  • Accessible anytime, anywhere with our Android and iOS apps.
Unit Circle Chart & Blank Practice Chart (PDF)

Unit Circle Chart & Blank Practice Chart If you’re looking for more information on what the unit circle is...

Unit Circle: How to Memorize & Use

What is the Unit Circle?   The unit circle is a circle, centered at the origin, with a radius...

SOHCAHTOA

SohCahToa is an acronym which helps you remember how to find the basic trig functions: sine, cosine and tangent....

Law of Sines: How to Use & Practice Examples

The Law of Sines (or the Sine Rule) tells us that the ratio of a side length to the...

Law of Cosines: How to Use & Practice Examples

We have already seen how to solve triangles using the Law of Sines. Such problems involve two sides and...