Take a Test - molly lawre https://www.mathxl.com/Student/PlayerTest.aspx7testid-

Question

Take a Test - molly lawre https://www.mathxl.com/Student/PlayerTest.aspx7testid-174320022&centerwin-yes; 126-5B Fall 2017 st: Exam 4-71-7.3, 7.5,7.6 s Question: 1 pt 3 of 32 Solve the triangle. b-6 430 c 7 (Do not round until the final answer. Then round to the nearest tenth as needed.) (Do not round until the final answer. Then round to the nearest degree as needed.) (Do not round untilthe final answer. Then round to the nearest degree as needed.) Enter your answer in each of the answer boxes.

Explanation / Answer

by law of cosines

a2=b2+c2-2bccosA

=>a2=62+72-2*6*7cos43o

=>a=4.8545122374951..

=>a=4.9

by law of sines a/sinA=b/sinB=c/sinC

=>4.8545/sin43o=6/sinB=7/sinC

=>sinB=6sin43o/4.8545,sinC=7sin43o/4.8545

=>B=57.45o,C=79.54969684747o

=>B=57o,C=80o

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