[tex]\frac{BC}{\sin{A}} = \frac{AC}{\sin{B}}\Rightarrow AC = BC\times \frac{\sin{B}}{\sin{A}} \Rightarrow \frac{\sin{B}}{\sin{30}} = \frac{1}{2}\Rightarrow 2\sin{B} = \frac{1}{2}\Rightarrow \sin{B} = \frac{1}{4} \Rightarrow m(B) = 14.4775122\:grade[/tex]
Deci afirmatia este adevarata numai daca masura unghiului B este de 14.4775122 grade
