Розрахунок: quuA9C - 1
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= $$\frac{sin(\alpha)}{sin(\gamma)}$$ = $$\frac{v1}{v2}$$ sin(α) = $$sin(\alpha)$$ = $$\frac{v1\cdot sin(\gamma)}{v2}$$ α = arcsin( )$$\alpha$$ = $$arcsin(\frac{v1\cdot sin(\gamma)}{v2})$$ α = arcsin( )$$\alpha$$ = $$arcsin(\frac{sin(\gamma)\cdot v1}{v2})$$