Find A, given that a = 18.2, B = 62, and C = 48. Round answers to the nearest whole degree. Do not use a decimal point or extra spaces in the answer or it will be marked incorrect.

Answer 1

I assume A is an angle of a triangle with given sides. Recall your law of cosines:

a^2 = b^2 + c^2 - 2bc*cosA
331.24 = 3844 + 2304 - 5952 cosA
cosA = 0.97727
A = 12.237°