В треугольнике \(\displaystyle ABC\) угол \(\displaystyle C\) равен \(\displaystyle 90^{\circ} {\small,}\) \(\displaystyle \tg \angle B=\frac{9}{14} {\small,}\) \(\displaystyle BC=28 {\small.}\) Найдите \(\displaystyle AC {\small.}\)

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