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6. Bobby was proving the law of cosines and reached a point where he had the equation 6² = c² sin² (B) + c² os² (B) + a² — 2ac cos(B). - COS Which of the following steps are needed to complete the proof? Select all that apply. Foil for b² =h² + a² - 2ax + x². Factor c² for b² = c² [sin²(B) + cos²(B)] + a² − 2ac cos(B). Use the Pythagorean theorem to result in b² = h² + (a − x)². - Use the trigonometric identity sin²+ cos² = 1 for b² = c² + a² - 2ac cos(B).

6. Bobby was proving the law of cosines and reached a point where he had the equation 6² = c² sin² (B) + c² os² (B) + a² — 2ac cos(B). - COS Which of the following steps are needed to complete the proof? Select all that apply. Foil for b² =h² + a² - 2ax + x². Factor c² for b² = c² [sin²(B) + cos²(B)] + a² − 2ac cos(B). Use the Pythagorean theorem to result in b² = h² + (a − x)². - Use the trigonometric identity sin²+ cos² = 1 for b² = c² + a² - 2ac cos(B).

Algebra & Trigonometry with Analytic Geometry
Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter7: Analytic Trigonometry
Section7.3: The Addition And Subtraction Formulas
Problem 62E
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6. Bobby was proving the law of cosines and reached a point where he had the equation b² = c² sin² (B) + c² cos² (B) + a² − 2ac cos(B). - Which of the following steps are needed to complete the proof? Select all that apply. Foil for 6² h² + a² - 2ax + x². = Factor c² for b² = c² [sin² (B) + cos² (B)] + a² - 2ac cos(B). Use the Pythagorean theorem to result in 6² = Use the trigonometric identity sin²+ cos² h² + (a − x)². 1 for b² = c² + a² - 2ac cos(B). =
Transcribed Image Text:6. Bobby was proving the law of cosines and reached a point where he had the equation b² = c² sin² (B) + c² cos² (B) + a² − 2ac cos(B). - Which of the following steps are needed to complete the proof? Select all that apply. Foil for 6² h² + a² - 2ax + x². = Factor c² for b² = c² [sin² (B) + cos² (B)] + a² - 2ac cos(B). Use the Pythagorean theorem to result in 6² = Use the trigonometric identity sin²+ cos² h² + (a − x)². 1 for b² = c² + a² - 2ac cos(B). =
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