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Crank
3 years ago
10

Find the measure of angle A

Mathematics
1 answer:
Mariana [72]3 years ago
5 0
Apply the law of cosines. and solve for A

14^{2} = 11^{2} + 11^{2} - 2(11)(11)cos(A) \\ 
196 = 121 + 121 - 242cos(A)  \\ 
-46 = -242cos(A) \\cos(A) = 0.1900826446

 A = 79.04239272, or 79

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