'Sin 42' presentation slideshows

13-5

13-5. The Law of Sines. Warm Up. Lesson Presentation. Lesson Quiz. Holt McDougal Algebra 2. Holt Algebra 2. Warm Up Find the area of each triangle with the given base and height. 1. b =10, h = 7 2. b = 8, h = 4.6. 35 units 2. 18.4 units 2. Solve each proportion. 3. 4. 10.

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Right Triangle Triginometry

Right Triangle Triginometry. A Stand- Alone Instructional Resource. Created by Lindsay Sanders. Standards & Objectives. Students in Mathematics II will be able to- Discover the relationship of the trigonometric ratios for similar triangles.

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Warm Up Find the area of each triangle with the given base and height.

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Example 1

Example 1. SOLUTION. Use the law of cosines to find the length b . You need to find b , so use. –. b 2. a 2. +. c 2. 2 ac cos B. =. (. ). 7. Write law of cosines. (. ). –. b 2. a 2. +. c 2. 2 a c cos B. =. –. Substitute for a , c , and B. b 2. 7 2. +. 12 2.

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2.5 Solving Right Triangles

2.5 Solving Right Triangles. OBJ: Find missing sides and angles of a right triangle. sin(74 ? 8 ? 14 ??) sin(74 + 8 60 + 14 3600) = .962 74.137 ? sin (74.137 ? ). sin 0 0 sin 30 .5 sin 60 .87 sin 90 1

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EQ: What is the law of sines, and how can we use it to solve right triangles?

EQ: What is the law of sines, and how can we use it to solve right triangles?. EQ: What is the law of sines, and how can we use it to solve right triangles?. The Law of Sines allows you to solve a triangle as long as you know either of the following:.

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