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Jim and Brenda are preparing for a trigonometry test. When they see this practice question, Jim decides to use Sine Law and Brenda decides to use Cosine Law to start solving the whole triangle. Who is correct? Find any mistakes and explain what went wrong. After finding any errors, solve the triangle. State side b rounded to the nearest hundredth of a metre and

Jim and Brenda are preparing for a trigonometry test. When they see this practice question, Jim decides to use Sine Law and Brenda decides to use Cosine Law to start solving the whole triangle. Who is correct? Find any mistakes and explain what went wrong. After finding any errors, solve the triangle. State side b rounded to the nearest hundredth of a metre and

Elementary Geometry for College Students
Elementary Geometry for College Students
6th Edition
ISBN:9781285195698
Author:Daniel C. Alexander, Geralyn M. Koeberlein
Publisher:Daniel C. Alexander, Geralyn M. Koeberlein
Chapter11: Introduction To Trigonometry
Section11.4: Applications With Acute Triangles
Problem 8E
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Jim and Brenda are preparing for a trigonometry test. When they see this practice question, Jim decides to use Sine Law and Brenda decides to use Cosine Law to start solving the whole triangle. Who is correct? Find any mistakes and explain what went wrong. After finding any errors, solve the triangle. State side b rounded to the nearest hundredth of a metre and ZC as an integer. A 109° 2.7 m с Jim's Calculations: sin 18 2.7 sin C 7.1 sin C = sin 18 2.7 LC = 0.81° - 7.1 . 7.1 m Brenda's Calculations: a² = 2.7² +7.1² - 2(2.7) (7.1) cos 109 a²70.18228304 a = 8.4 m 18⁰ B
Transcribed Image Text:Jim and Brenda are preparing for a trigonometry test. When they see this practice question, Jim decides to use Sine Law and Brenda decides to use Cosine Law to start solving the whole triangle. Who is correct? Find any mistakes and explain what went wrong. After finding any errors, solve the triangle. State side b rounded to the nearest hundredth of a metre and ZC as an integer. A 109° 2.7 m с Jim's Calculations: sin 18 2.7 sin C 7.1 sin C = sin 18 2.7 LC = 0.81° - 7.1 . 7.1 m Brenda's Calculations: a² = 2.7² +7.1² - 2(2.7) (7.1) cos 109 a²70.18228304 a = 8.4 m 18⁰ B
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