dalekqueenp5706a dalekqueenp5706a

07-03-2018
Mathematics

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In ΔABC, a = 6.9 inches, b = 2.8 inches and ∠C=7°. Find the length of c, to the nearest 10th of an inch.

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tynollette tynollette

07-03-2018

use law of consine, c²=a²+b²-2abcosC=6.9²+2.8²-2*6.9*2.8cos7
use your calculator: c≈4.1
please use your calculator to double check my answer.

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