Use the Law of Cosines to find the missing angle. Find m∠B, given a = 11, b = 12, and c = 17.

asked Sep 6, 2018 22.5k views

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Use the Law of Cosines to find the missing angle.
Find m∠B, given a = 11, b = 12, and c = 17.

by Bpapa

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b^2=a^2+c^2-2ac*cosB

cosB=(a^2+c^2-b^2)/(2ac)

B=arcos[(a^2+c^2-b^2)/(2ac)]

B=44.664924531140738644131908835392

B≈44.7

Olatunbosun answered Sep 13, 2018

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