Question

| В Find the measure of ZA in AABC. Since we are given information here, we can use the following equation to solve for MZA. 55 DONE 35 А C 50

Answer 1

`\begin{gathered} \text{Law of Cosine} \\ BC^2=AB^2+AC^2-2* AB* AC*\cos A \\ 55^2=35^2+50^2-2*35*50*\cos A \\ 3025=1225+2500-3500*\text{cosA} \\ -3500*\cos A=3025-1225-2500 \\ -3500*\cos A=-700 \\ \cos A=(700)/(3500) \\ A=\cos ^(-1)(0.2) \\ A=78.46^(\circ) \end{gathered}`