If \( \cos \angle B=\sin \angle A \) and \( m \angle A=32^{\circ} \), what is the measure of \( \angle B \) ?
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Bonus Knowledge
To solve the problem, we start with the given information: We have \( \cos \angle B = \sin \angle A \) and \( m \angle A = 32^{\circ} \). Since \( \sin \angle A = \sin 32^{\circ} \), we can use the co-function identity of sine and cosine, which states: \[ \sin \theta = \cos(90^\circ - \theta) \] Thus, we can write: \[ \sin 32^{\circ} = \cos(90^\circ - 32^{\circ}) = \cos 58^{\circ} \] Now, substituting this back into our equation, we have: \[ \cos \angle B = \cos 58^{\circ} \] The solution for \( \angle B \) could be: \[ \angle B = 58^{\circ} \quad \text{or} \quad \angle B = 360^\circ - 58^\circ = 302^\circ \] Since we are looking for an angle typically measured in [0°, 180°], we take: \[ \angle B = 58^{\circ} \] Therefore, the measure of \( \angle B \) is \( \boxed{58^\circ} \).