[tex] tan \theta = \frac{ opposite}{adjacent} [/tex]
And in the given diagram,
[tex] opposite = 2 \sqrt 3, adjacent =-2 [/tex]
Substituting these values in the formula of tan theta, we will get
[tex] tan \theta = \frac{2 \sqrt3}{-2} [/tex]
Simplifying the fraction,
[tex] tan \theta = - \sqrt 3 [/tex]
