Answer
$\frac{sine β}{8.1}$ = $\frac{sine 86°}{8.4}$
Work Step by Step
Given b=8.1, c=8.4, γ=86°
Using theorem 11.4.2
By law of sines
$\frac{sine β}{b}$ = $\frac{sine γ}{c}$
$\frac{sine β}{8.1}$ = $\frac{sine 86°}{8.4}$
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