Here is a site that clearly and thoroughly explains the graphs of the major mathematical functions. There are example problems solved, problems for the student to attempt, and answers to the student problems. Point this site out to...

Use this pre-calculus tutorial to learn about absolute values.

Trigonometry ratios and their signs are given in this explanation of the other trig functions. Graphs of tangent, cotangent, secant, and cosecant are given. Examples are included.

In this Computer Algebra System (CAS) activity, students use the statistical, graphical, and symbolic capabilities of the calculator to make it a powerful tool for investigating and developing mathematical concepts. Includes teacher...

Students explore nonlinear inequalities. Graphs and detailed examples are included.

A set of exercises of moderate difficulty on rational functions, complete with solutions and hints for students..

Wrap up a bigger pre-calculus tutorial by taking a look at exponentials and logarithms.