Right Triangle Trigonometry (Chapter 2)
Lesson 5: Solve Right Triangles Using Trigonometric Ratios
Tools to Solve a Right Triangle (i.e. finding all the unknown)
1. Angle Sum of a Triangle (180°)
2. Pythagorean Theorem (Find the 3rd side given two other sides)
3. Trigonometric Ratios: Sine, Cosine & Tangent (SOH CAH TOA)
BUT ... How Do I Know Which Trigonometric Ratio to Use?
In other words, figure out the side that is not given and eliminate the two trigonometric ratios that cannot be used with the given angle and side lengths.
The remaining ratio is the one we should use to solve for the unknown value.
The remaining ratio is the one we should use to solve for the unknown value.
Video 1: What Does it Mean by Solving a Right Triangle?
Video 2: Solving a Right Triangle
Video 3: Multi-Step Problem with Two Right Triangles (Ex. 1)
Video 4: Multi-Step Problem with Two Right Triangles (Ex. 2)
Lesson 5 Practice:
Handout 3-9:
Handout 3-10: Handout 3-11: |
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