Verify That Each Equation Is an Identity $$7 \csc ^ { 2 } \theta - 3 \cot ^ { 2 } \theta = 4 \csc ^ { 2 } \theta + 3$$

Essay

Verify that each equation is an identity.
- $$7 \csc ^ { 2 } \theta - 3 \cot ^ { 2 } \theta = 4 \csc ^ { 2 } \theta + 3$$