1.

Tan(? + ?) =

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


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