1.

Cot(? ?) =

A. Cot?-cot?/1 + cot?cot?
B. Cot?+cot?/1-cot?cot?
C. Cot?cot?-1/cot?+cot?
D. Cot?cot?+1/cot?+cot?
Answer» B. Cot?+cot?/1-cot?cot?


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