1.

\sqrt { \frac { 1 + \operatorname { sin } \theta } { 1 - \operatorname { sin } \theta } } - \operatorname { sec } \theta = \operatorname { sec } \theta - \sqrt { \frac { 1 - \operatorname { sin } \theta } { 1 + \operatorname { sin } \theta } }

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