The Balance
The Balance: An Introduction to the Financial Markets
This article explains what the different types of financial markets are, including stocks, bonds, commodities, and derivatives, as well as what the functions of financial markets are.
CK-12 Foundation
Ck 12: Trigonometry: Introduction to the Triangle Area Formula
[Free Registration/Login may be required to access all resource tools.] This lesson covers how to find the area of a triangle using sine.
University College London
University College London: Introduction to Hyperbolic Functions
This is a brief introduction to hyperbolic functions. Contains a definition only, no graphics.