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House Committee on Financial Services
This website describes the House Committee on Financial Services. The chairman of this committee is Michael G. Oxley. "The Committee oversees the entire financial services industry, including the securities, insurance, banking and...
Mathematics Archives
Math Archives: Visual Calculus: Reduction Formulas
This tutorial presents a series of trigonometric integrals to solve using recursion or reduction formulas. Click Solution next to each formula and a popup screen provides the solution.
Northeast Parallel Architectures Center, Syracuse University
Npac Reu Program: Sign (+ or ) of the Trig Functions
Northeast Parallel Architectures Center of Syracuse University provides a quick overview of the signs of the six trigonometric functions in the four quadrants of the coordinate plane.
Northeast Parallel Architectures Center, Syracuse University
Npac Reu Program: Trig Function Graphs
Northeast Parallel Architectures Center provides a quick overview of the graphs of the six trigonometric functions, with angles measured in radians.
Northeast Parallel Architectures Center, Syracuse University
Npac Reu Program: Trigonometric Functions
This Northeast Parallel Architectures Center of Syracuse University site offers a quick overview of the six trigonometric functions from the standpoint of the unit circle.
Clark University
Clark University: Dave's Short Trig Course: Summary of Trig Identities
This Clark University page is an excellent reference page for trig identities. It is a little difficult to read so take your time with the formulas. If you remember soh - cah - toa, the other formulas are right here.
Other
U.s. Securities and Exchange Commission: Internet Fraud
"This alert tells you how to spot different types of Internet fraud, what the SEC is doing to fight Internet investment scams, and how to use the Internet to invest wisely."
Other
Sec: Tips for Online Investing
The Securities and Exchange Commission helps the online investor get started with this informative article on what and what not to do when investing online.
Other
Avoiding Internet Investment Scams: Tips for Investors
Worried about investment opportunities you learn about through the Internet? "Get the facts before you invest, and only invest money you can afford to lose. You can avoid online investment scams by asking and getting answers to three...
Library of Congress
Loc: America's Story: Stock Market Fell to Lowest Point
This 3-page article provides a general overview of the devastation caused by the fallen stock market during the Depression.
University of St. Andrews (UK)
University of St. Andrews: Trigonometric Functions
This site from the University of Saint Andrews provides an historical look at the origins of trig functions. This site ties together mathematics and history from Hipparchus to Ptolemy to Lambert.
Purple Math
Purplemath: Solving Simple (To Medium Hard) Trig Equations
Introduces techniques for solving trigonometric equations. Provides worked examples of solving some simpler to medium-hard equations.
Curated OER
Zona Land: Overlapped Graph of the Six Trig Functions
An overview of the six trig functions and their graphs. The site is a little difficult to navigate but is good for finding a graph of a trig function.
Math2
Math2.org: Trigonometry Tables
Three trig tables are provided for student and teacher reference. The first table lists the sine, cosine, tangent, secant, cosecant, and cotangent values of all whole-number angles from 0 to 90. The radian equivalent (to four decimals)...
Wolfram Research
Wolfram Math World: Secant
Graphs of the secant function, both 2-dimensional and 3-dimensional. The site from MathWorld gives the relation of secant to cosine, if you are not familiar with cosine there is a link for an understanding.
Wolfram Research
Wolfram Math World: Trigonometry
This site provides a good definition of trigonometry. Includes many links to key terms and many more to related terms. This site may be used as a refresher for students who have finished the course, or students currently studying the...
Interactive Mathematics
Interactive Mathematics: Sine, Cosine, Tan & Reciprocals
The definitions of the six trig ratios are presented here, along with several examples of how to determine the ratios given 2 or more sides of a right triangle.
Interactive Mathematics
Interactive Mathematics: Trigonometric Functions
This is a excellent review lesson about trigonometric functions of any angle. Good examples here.
Interactive Mathematics
Interactive Mathematics: Trigonometric Functions
Just about everything you need to know about trigonometry can be found here. Interactive examples and demonstrations help to enhance the lessons. Although not required, the tutorial uses Live Math and Scientific Notebook.
Math Open Reference
Math Open Reference: Derivatives of the Trigonometric Functions
Gain an understanding of the derivatives of the six common trigonometric functions with this helpful reference tool. Provides a detailed definition and examples that enhance further explanation. Includes links to related topics.