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Today’s agenda Warm-up Homework Questions?? 13.1B Notes Assignment: 13.1 Skills Practice 2

Warm-up

I can . . . solve equations involving inverse trigonometric functions. solve problems involving right angles. Lesson 13.1a

Example 7: Solve ABC. Round measures of sides to the nearest tenth and measures of angles to the nearest degree. (Find all missing angles & sides.) Find A: Find B: H O 32 A Example 1-4a

Example 8: Solve ABC. Round measures of sides to the nearest tenth and measures of angles to the nearest degree. (Find all missing angles & sides.) Find A: Find B: O H 30 A Example 1-4a

Angles of elevation & depression Angle of Depression θº Angle of Elevation θº

Example 9: Bridge Construction: In order to construct a bridge across a river, the width of the river must be determined. A stake is planted on one side of the river directly across from a second stake on the opposite side. At a distance 30 meters to the left of the stake, an angle of 55 is measured between the two stakes. Find the width of the river. 1 O A

Example 10: Skiing: A run has an angle of elevation of 15.7 and a vertical drop of 1800 feet. Estimate the length of this run.   1 H O

Today’s assignment 13.1 Skills Practice #7 - 10