Find the tangents of the angles of the triangle ABC. Also FInd the angles to the nearest degree. (This must be expressed in minutes degrees and seconds. And there are no negative angles)

A(-3,1), B(3,5), C(-1,6)

Hi Im using the formula

$\displaystyle tan\theta = \frac{m_2 - m_1}{1+ (m_2)(m_1)}$

very much appreciated

Merry xmas!