[Solved] Solve the problem. -\[\cot ^ { 2 } \frac { u } { 2 } = \frac { \csc u + \cot u } { \csc u - \cot u }\] Degrees of Freedom: The number of unique values or quantities that can be applied to a statistical distribution. Test Statistic: A measure obtained from sampled data, utilized in a hypothesis test to ascertain the rejection of the null hypothesis. Rejection Region: The range of values in hypothesis testing that if attained or exceeded by the test statistic would lead to the rejection of the null hypothesis. Weight Losses: Weight losses refer to the amount of weight that an individual or a group loses over a period, often measured in studies related to diet, fitness, or health interventions.