[tex] \sin( \beta ) = \frac{ac}{ab} = \frac{7}{14} = \frac{1}{2} \\ \sin(30) = \frac{1}{2} \\ \beta = 30[/tex]
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[tex] \sin( \beta ) = \frac{ac}{ab} = \frac{7}{14} = \frac{1}{2} \\ \sin(30) = \frac{1}{2} \\ \beta = 30[/tex]