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dezoksy [38]
3 years ago
7

Need to find the length of a

Mathematics
1 answer:
stepan [7]3 years ago
3 0

Answer:

a ≈ 19.45

Step-by-step explanation:

<u><em>Law of Cosines</em></u>

a=c2+b2﹣2cbcosγ

=112+132﹣2·11·13·cos(108°)

≈19.45196

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