виберіть правильне твердження a)[tex]\frac{a}{sin\beta }[/tex]=[tex]\frac{b}{sin y}[/tex]=[tex]\frac{c}{sin a}[/tex] б) [tex]\frac{a}{sin\beta }[/tex]=[tex]\frac{b}{sin a}[/tex]=[tex]\frac{c}{sin y}[/tex] в) tex]\frac{a}{sin\a }[/tex]=[tex]\frac{b}{sin\beta}[/tex]=[tex]\frac{c}{sin y}[/tex]
г)[tex]\frac{a}{sin\beta } = 2R[/tex]
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