Verify That Each Equation Is an Identity $$\frac { \tan x + \cot x } { \tan x - \cot x } = \frac { 1 } { \sin ^ { 2 } x - \cos ^ { 2 } x }$$

question 227

Essay

Verify that each equation is an identity.
- $$\frac { \tan x + \cot x } { \tan x - \cot x } = \frac { 1 } { \sin ^ { 2 } x - \cos ^ { 2 } x }$$

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