Use a Sum or Difference Identity to Find the Exact $$\frac { \sin \theta } { 1 + \sin \theta } - \frac { \sin \theta } { 1 - \sin \theta }$$

Multiple Choice

Use a sum or difference identity to find the exact value.
- $$\frac { \sin \theta } { 1 + \sin \theta } - \frac { \sin \theta } { 1 - \sin \theta }$$

A) $\sec \theta \csc \theta$
B) $- 2 \tan ^ { 2 } \theta$
C) $1 + \cot \theta$
D) $\sin \theta \tan \theta$