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wlad13 [49]
3 years ago
12

Find the length a. a=?

Mathematics
1 answer:
algol [13]3 years ago
6 0
Cosine law 
a²=b²+c²-2ab*cosA

a²=13²+11²-2*13*11*cos(108)≈378.37
a≈19.45
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3 years ago
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