## Precalculus (10th Edition)

First, we can only calculate the angle $B$ with the help of the Law of Sines: $\frac{sin(A)}{a}=\frac{sin(B)}{b}$ $\frac{sin(70°)}{3}=\frac{sin(B)}{7}$ $sin(B)=2.193$ From this equation, we can get zero solutions, because the sine function can only have values of: $-1\le\sin x\le1$ Therefore there is no triangle which can be formed from these values.