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Mastering Basic Trigonometry: Understanding SOHCAHTOA and Trig Ratios

Dive into the fundamentals of trigonometry with our comprehensive primer on SOHCAHTOA. Learn how to find sine, cosine, and tangent ratios using real-world examples, including calculating angles from triangle sides. Explore the traditional methods of using trigonometric tables and inverse functions to find unknown angles. Interactive elements enhance your learning experience, making trigonometry accessible and engaging. Discover how triangles relate to various applications, and debunk the misconception that trigonometry is overly complicated.

damian-house
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Mastering Basic Trigonometry: Understanding SOHCAHTOA and Trig Ratios

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  1. BasicTrigonometry Primer

  2. SOHCAHTOA

  3. How to find Trig Ratios: Trig Tables (old way) SIN COS TAN

  4. SOHCAHTOA  HYPOTENUSE 100 cm ADJACENT 80.5cm OPPOSITE 80.5 100 = 0.805 tan  =  = 38.8˚

  5. 80.5 100 = 0.805 tan  = tan -1 (0.805) =  “inverse trigonometric function” Enter: “0.805” “2nd“ “tan” Answer: 38.8˚

  6. Interactive (next slide) http://www.mathsisfun.com/sine-cosine-tangent.html

  7. FAQ About Trigonometry catcode.com/trig/index.html Q: What is trigonometry? A: Trigonometry is the study of how the sides and angles of a triangle are related to each other. Q: WHAT? That’s all? A: Yes, that’s all. It’s all about triangles, and you can’t get much simpler than that. Q: You mean trigonometry isn’t some big, ugly monster that makes students turn green, scream, and die? A: No. It’s just triangles. Q: Oh. But isn’t that boring? A: We’ll try to make it a little more fun by letting you play around with the triangles interactively.

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