Question

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.

Answer 1

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`