'2 2 ac cos' diaporamas de présentation

Use the Law of Cosines to find the side lengths and angle measures of a triangle.

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Warm-up:

Warm-up:. Solve the triangle. 15 a b. 100 50 x. Answers. X=30 ° b = 29.544 a = 22.981. Precalculus Lesson 6.2. Check:

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EXAMPLE 1

Solve ABC with a = 11 , c = 14 , and B = 34°. b 2 61.7. b 2 61.7. 7.85. EXAMPLE 1. Solve a triangle for the SAS case. SOLUTION. Use the law of cosines to find side length b. b 2 = a 2 + c 2 – 2 ac cos B. Law of cosines.

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EXAMPLE 1

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EXAMPLE 1

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Use the Law of Cosines to solve triangles. Apply Area Formula to triangles.

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Warm up

Preliminary Activity. Notes. For Fun. Warm up. Activity. θ. USING THE COSINE RULE TO FIND A MISSING ANGLE. θ. θ. Back. Back. 1. The cosine ratio is the ratio of A adjacent B opposite C adjacent D opposite hypotenuse adjacent opposite hypotenuse

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