Verify the Identity $\frac { 1 - \sin t } { \cos t } + \frac { \cos t } { 1 - \sin t } = 2 \operatorname { sect }$

Essay

Verify the identity. $\frac { 1 - \sin t } { \cos t } + \frac { \cos t } { 1 - \sin t } = 2 \operatorname { sect }$