Prove the Identity $$\csc ^ { 4 } x - \cot ^ { 4 } x = \csc ^ { 2 } x + \cot ^ { 2 } x$$

question 35

Essay

Prove the identity.
- $$\csc ^ { 4 } x - \cot ^ { 4 } x = \csc ^ { 2 } x + \cot ^ { 2 } x$$

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