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# $\Delta ABC$ is a right triangle,right-angled at A and $AD\perp BC$.Then $\large\frac{BD}{DC}$=____

$\begin{array}{1 1}\big(\large\frac{AB}{AC}\big)^2\\\big(\large\frac{AB}{AC}\big)\\\big(\large\frac{AB}{AD}\big)^2\\\big(\large\frac{AB}{AD}\big)\end{array}$

Answer : $\big(\large\frac{AB}{AC}\big)$
$\large\frac{BD}{DC}=\big(\large\frac{AB}{AC}\big)$