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Math - Other (7) - Khan Academy: High School level Intro to Trigonomentry (32) - 5h
  • 1. Basic Trigonometry
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  • 2. Basic Trigonometry II
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  • 3. Radians and degrees
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  • 4. Using Trig Functions
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  • 5. Using Trig Functions Part II
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  • 6. The unit circle definition of trigonometric function
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  • 7. Unit Circle Definition of Trig Functions
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  • 8. Graph of the sine function
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  • 9. Graphs of trig functions
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  • 10. Graphing trig functions
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  • 11. More trig graphs
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  • 12. Determining the equation of a trigonometric function
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  • 13. Trigonometric Identities
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  • 14. Proof: sin(a+b) = (cos a)(sin b) + (sin a)(cos b)
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  • 15. Proof: cos(a+b) = (cos a)(cos b)-(sin a)(sin b)
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  • 16. Trig identities part 2
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  • 17. Trig identies part 3
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  • 18. Trigonometry word problems (part 1)
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  • 19. Trigonometry word problems (part 2)
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  • 20. Law of cosines
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  • 21. Navigation Word Problem
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  • 22. Proof: Law of Sines
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  • 23. Ferris Wheel Trig Problem
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  • 24. Ferris Wheel Trig Problem (part 2)
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  • 25. Fun Trig Problem
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  • 26.Polar Coordinates 1
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  • 27.Polar Coordinates 2
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  • 28. Polar Coordinates 3
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  • 29. Inverse Trig Functions: Arcsin
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  • 30. Inverse Trig Functions: Arctan
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  • 31. Inverse Trig Functions: Arccos
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  • 32. Trigonometry Identity Review/Fun
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Description

 Trigonometry (from Greek trigōnon "triangle" + metron "measure")[1] is a branch of mathematics that studies triangles, particularlyright triangles. Trigonometry deals with relationships between the sides and the angles of triangles and with the trigonometric functions, which describe those relationships, as well as describing angles in general and the motion of waves such as sound and light waves.

Trigonometry is usually taught in secondary schools either as a separate course or as part of a precalculus course. It has applications in both pure mathematics and in applied mathematics, where it is essential in many branches of science and technology. A branch of trigonometry, called spherical trigonometry, studies triangles on spheres, and is important in astronomyand navigation.

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More Reading

http://press.princeton.edu/books/maor/

http://baqaqi.chi.il.us/buecher/mathematics/trigonometry/index.html

http://www.clarku.edu/~djoyce/trig/

 
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