Simplify the Trigonometric Expression $\frac { 1 - \cos x } { \sin x } + \frac { \sin x } { 1 - \cos x }$

question 113

Essay

Simplify the trigonometric expression. $\frac { 1 - \cos x } { \sin x } + \frac { \sin x } { 1 - \cos x }$

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