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MATH / In right triangle ABC, we have ∠BAC=90^(∘) and D is on (AC)¯ such that (BD)¯ bisects ∠ABC. If AB=12 and BC=15, then what is cos∠BDC? · Discussion

Discussing In right triangle ABC, we have ∠BAC=90^(∘) and D is on (AC)¯ such that (BD)¯ bisects ∠ABC. If AB=12 and BC=15, then what is cos∠BDC? · MATH

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