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Given b = 25, A = 77 degrees, and c = 30, use the Law of Cosines to solve for a. Round your answer to the nearest tenth, and enter the number only. Note: The figure is not drawn to scale.
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Given b = 25, A = 77 degrees, and c = 30, use the Law of Cosines to solve for a. Round your answer to the nearest tenth, and enter the number only. Note: The figure is not drawn to scale.

User Anindya Chatterjee
by
7.5k points

1 Answer

5 votes

Answer:

a = 34.5 units

Explanation:


a=√(b^2+c^2-2bc\cos(A))\\a=√(25^2+30^2-2(25)(30)\cos(77^\circ))\\a\approx34.5

User Eek
by
8.1k points
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