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Solve the Problem cot2u2=cscu+cotucscucotu\cot ^ { 2 } \frac { u } { 2 } = \frac { \csc u + \cot u } { \csc u - \cot u }

Question 2

Essay

Solve the problem.

- cot2u2=cscu+cotucscucotu\cot ^ { 2 } \frac { u } { 2 } = \frac { \csc u + \cot u } { \csc u - \cot u }

Correct Answer:

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