Using a Sum or Difference Identity, Write the Following as an Expression

Multiple Choice

Using a sum or difference identity, write the following as an expression involving functions of x.
- $\tan \left( x + \frac { \pi } { 6 } \right)$

A) $\frac { \tan x - \sqrt { 3 } } { 1 + \sqrt { 3 } \tan x }$
B) $\frac { 1 + \sqrt { 3 } \tan x } { \sqrt { 3 } - \tan x }$
C) $- \tan x$
D) $\tan x$