Question

Which equation can be used to solve for angle A?

Answer 1

C

By the law of sines, $\frac{sinA}{a}=\frac{sinB}{b}=\frac{sinC}{c}$ where A, B, C are the angles and a, b, c are the lengths of the sides opposite their respective angles. In this case, $110^{\circ}$ is opposite 4.6 and A is opposite 3.2, so $\frac{sinA}{3.2}=\frac{sin(110^{\circ})}{4.6}$, giving the answer.