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Trigonometry Ratios

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**Example 1 Write the Trig Ratio for each of the following**

( soh, cah, toa)

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**Example 2 Write each ratio as a fraction and decimal ( soh, cah, toa)**

change to B

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**Solving Right Triangles : Inverse Functions**

When you are finding an angle measurement, you must use… _________________________ keys (_________) inverse

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**Example 3 Find the acute angles: ****Write as a ratio FIRST******

Change to DEGREE in Calculator ( soh, cah, toa)

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**Example 4 Find all unknown measures:**

(find both acute angles and missing side. ) ( soh, cah, toa) Find angles: use inverse key _______________ Find : use Pythagorean Theorem

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**To completely solve a right triangle you must have:**

_________________ OR ______________________________________ 2 sides lengths One side length and one acute angle

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Example 5 Find Steps: 1. 2. Set up: 3. Substitute: Solve for x 4.

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Chapter 7 – Right Triangles and Trigonometry

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