Write the Word or Phrase That Best Completes Each Statement $$\frac { 1 - \sin t } { \cos t } = \frac { \cos t } { 1 + \sin t }$$

Essay

Write the word or phrase that best completes each statement or answers the question.
Establish the identity.
- $$\frac { 1 - \sin t } { \cos t } = \frac { \cos t } { 1 + \sin t }$$