## Elementary Geometry for College Students (7th Edition)

$\frac{sine 40°}{5}$ = $\frac{sine β}{8}$
Given a=5 b=8 and α =40° By law of sines $\frac{sine α}{a}$ = $\frac{sine β}{b}$ $\frac{sine 40°}{5}$ = $\frac{sine β}{8}$