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In ΔABC, a = 260 inches, b = 480 inches and c=430 inches. Find the measure of ∠C to the nearest 10th of a degree.
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May 10, 2022
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In ΔABC, a = 260 inches, b = 480 inches and c=430 inches. Find the measure of ∠C to the nearest 10th of a degree.
Mathematics
college
Justin Meiners
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By the cosine rule
430^2 = 260^2 + 480^2 - 2(260)(480)cos(C)
C = arccos([260^2 + 480^2 - 430^2]/2(260)(480)
C = 63.1 degrees (nearest tenth of a degree)
John Pasquet
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May 15, 2022
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John Pasquet
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