To find angle $ \alpha $ use formula:
$$ \sin \left( \alpha \right) = \dfrac{ a }{ c } $$After substituting $ a = 8 $ and $ c = 14 $ we have:
$$ \sin \left( \alpha \right) = \dfrac{ 8 }{ 14 } $$ $$ \sin \left( \alpha \right) = \frac{ 4 }{ 7 } $$ $$ \alpha = \arcsin\left( \frac{ 4 }{ 7 } \right) $$ $$ \alpha = 34.8499^o $$