This site contains a collection of review materials for Trigonometry along with examples and sample problems with detailed solutions. Topics include: trigonometry, angle measures, trigonometric functions, trigonometric equations, trigonometric identities, solving trigonometric equations, derivatives of trig functions, and hyperbolic and inverse hyperbolic functions. S.O.S. Mathematics/Trigonometry is a part of a commercial site that offers mathematics review materials to high school and college students. All of the materials are freely accessible but may also be purchased via CD.
Type of Material:
Reference material; tutorial
Recommended Uses:
This site can be used as a supplement to a standard Trigonometry course or as an online study guide.
Technical Requirements:
none
Identify Major Learning Goals:
Review of topics for a standard course in Trigonometry
Target Student Population:
Trigonometry students.
Prerequisite Knowledge or Skills:
College Algebra
Content Quality
Rating:
Strengths:
The site provides review materials that cover many topics in a typical Trigonometry course. It provides general explanations and examples as well as exercises with detailed, step-by-step solutions. In large part, the examples are nicely presented and the student problems and associated answers are also well presented. Students have the opportunity to attempt the exercises on their own before accessing the solutions.
Concerns:
The site does not include the topics of solving triangles or the laws of sines or cosines. In several places, formulas and concepts are presented with little or no explanation.
Potential Effectiveness as a Teaching Tool
Rating:
Strengths:
These resources are an excellent source of review for Trigonometry concepts. The examples and student problems with detailed solutions reinforce the concepts involved. In some student problem solutions, there is a list of general principles and/or procedures that pertain to the particular problem along with detailed, step-by-step solutions.
Concerns:
Not all topics provide student exercises (e.g., Addition Formulas, Double Angle Formulas, etc). There is no interactivity provided; however, the static presentation is fairly thorough.
Ease of Use for Both Students and Faculty
Rating:
Strengths:
The site navigation is linear for the most part. The topics are generally representative of those presented in Trigonometry. Since the site is text-based, a student will need to possess only the most basic Internet skills in order to progress through the materials.
Concerns:
The formatting of math equations and symbols is ok but not always consistent, e.g., sometimes the hyphen is used instead of the en dash to indicate subtraction.
The navigation isnt always consistent, e.g., at the end of sections such as Inverse Hyperbolic Functions, there are no links back to the Trigonometry home page.
The use of the phrase, it is not hard to see can be frustrating to a student who finds a concept hard to see.
Creative Commons:
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