Trigonometry

Guide Note

Trigonometry is also known as "trig". It is a branch of mathematics that explores triangles and the relationships of sides and degrees.

Fast Facts

1. Was probably invented for nautical navigation
2. Origins can be traced to ancient Egypt
3. First recorded use came from Hipparchus
4. Ptolemy further developed trigonometric calculations

Glossary

1. Triangle: Polygon with 3 sides and 3 angles
2. Right Angle: Angle that measures 90 degrees or one half of a Pi radian
3. Right Triangle: A triangle with one right angle
4. Hypotenuse: The side of a triangle that is directly opposite of the right angle
5. Pythagorean Theorem: States that the square of the hypotenuse is equal to the sum of the squares of the other two sides in a right triangle
6. Trigonometric Functions: Sine, Cosine, Tangent, Cotangent, Secant, Cosecant

Edit Guide Note and Fast Facts

The Mahalo Top 7

1. Wikipedia: Trigonometry
2. Clark University: What is Trigonometry? | Dave's Short Trigonometry Course
3. Wikibooks: Trigonometry Online Textbook
4. S.O.S. Mathematics: Trigonometry 
5. Math.com: Trigonometry Function Overview 
6. Wolfram Math World: Trigonometry | Trigonometry Angles
7. University of St Andrews School of Mathematics & Statistics: Trigonometric Functions

Trigonometry News

• Google News: Trigonometry

Trigonometry History

• Think Quest: History of Trigonometry
• Rutgers University Mathematics Department: "The Beginnings of Trigonometry" (2000)
• Wikipedia: History of Trigonometry
• BookRags: Trigonometry

Notable Figures in Trigonometry

• University of Cambridge: Hipparchus
• Wikipedia: Menelaus of Alexandria | Ptolemy | Omar Khayyam
• University of St. Andrews: Aristarchus of Samos
• Bluepete Biographies: Copernicus
• Virtual Museum of Surveying: Edmund Gunter

Trigonometry Education Resources

Trigonometry Tutorials

• Fergus Ray Murray: Trigonometry Tutorial
• MATH-abundance: Introduction to Trigonometry Tutorial
• International Education Software: Introduction to Trigonometry Functions

Trigonometry Homework Help

• FreeMathHelp.com: Trigonometry Help
• Webmath.com: Interactive Trigonometry Help

Trigonometry Other Resources

• The Math Forum: Trigonometry Formulas
• KidsOLR: Calculus, Geometry, Integrals, Statistics, Trigonometry
• Suffolk University: Trigonometry Resources

Trigonometry Photos and Videos

• Fergus Ray Murray: Trigonometry As Art
• Google Image Search: Trigonometry
• GUBA: Trigonometry Functions (Time: 13:28) | Trigonometry The Basics (Time: 15:04)  
• YouTube: Using the Quadrant Method to Solve Trigonometry Problems (Time: 5:26)

Trigonometry Blogs and Forums

• Google Blog Search: Trigonometry
• Math Forums @ Math Goodies: Geometry and Trigonometry
• Physics Forum: Trigonometry
• The Math Forum: Trigonometry Search Result

Trigonometry Books, Publications and Merchandise

• Barnes & Noble: Trigonometry for Dummies | Trigonometry Demystified
• Google Book Search: Trigonometry
• Amazon.com: Trigonometry
• Bagatrix: Trigonometry Problem Solver

Trigonometry Fun Stuff

• CafePress.com: Trigonometry Shop
• Classpad.org: Fun with Trigonometry

Trigonometry Laws

• Wikipedia: Law of Sines | Law of Cosines | Pythagorean Theorem
• Wolfram MathWorld: Law of Tangents
• Clark University: Laws of Cosines and Sines

Uses of Trigonometry

• Wikipedia: Uses of Trigonometry
• Math Careers: What's the Use of Trigonometry?
• Algebra for the Athletes.com: Land Surveyors & Trigonometry
• U.S. Department of Energy: Careers & Trigonometry

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