Decide Whether the Expression Is or Is Not an Identity$$\frac { 1 } { 1 - \cos x } + \frac { 1 } { 1 + \cos x } = \csc ^ { 2 } x$$

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The Answer of Decide Whether the Expression Is or Is Not an Identity$$\frac { 1 } { 1 - \cos x } + \frac { 1 } { 1 + \cos x } = \csc ^ { 2 } x$$

Decide Whether the Expression Is or Is Not an Identity $\frac { 1 } { 1 - \cos x } + \frac { 1 } { 1 + \cos x } = \csc ^ { 2 } x$