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# In right triangle $ABC$, we have $\angle BAC = 90^\circ$ and $D$ is on $\overline{AC}$ such that $\overline{BD}$ bisects $\angle ABC$. If $A +2 134 0 +598 In right triangle$ABC$, we have$\angle BAC = 90^\circ$and$D$is on$\overline{AC}$such that$\overline{BD}$bisects$\angle ABC$. If$AB = 12$and$BC = 15$, then what is$\cos \angle BDC\$?

michaelcai  Nov 14, 2017
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