# Sine or Cosine Rule?

Geometry Level 4

In $$\Delta ABC$$, $$AD$$ is the altitude from $$A$$. Given $$b\gt c$$, $$\angle C=23^{\circ}$$ and $$AD=\frac{abc}{b^{2}-c^{2}}$$, find $$\angle B$$. Enter your answer in degrees.

#### This problem is part of the set Trigonometry.

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