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Sphinxa [80]
4 years ago
15

Given a triangle with b = 7 c = 3 and A = 37 degrees, what is the length of a?

Mathematics
1 answer:
Verizon [17]4 years ago
7 0
Using cosine rule a^2 = b^2 + c^2 - 2bc cos A = 7^2 + 3^2 - (2 x 7 x 3) cos 37 = 49 + 9 - 42cos 37 = 58 - 33.54 = 24.46
a = sqrt(24.46) ≈ 5
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