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| 1. |
the value of 2 cot(cot^(-1)(3)+cot^(-1)(7)+cot^(-1)(13)+ cot^(-1)(21)) is |
| Answer» the value of 2 cot(cot^(-1)(3)+cot^(-1)(7)+cot^(-1)(13)+ cot^(-1)(21)) is | |