ash0lbe0lesBurlygar ash0lbe0lesBurlygar

08-11-2016
Mathematics

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

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nobillionaireNobley nobillionaireNobley

12-11-2016

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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20-03-2021

Answer: A=4.9

Step-by-step explanation:

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