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1984 AIME Problems/Problem 13

Revision as of 01:40, 21 January 2007 by Minsoens (talk | contribs)

Problem

Find the value of $\displaystyle 10\cot(\cot^{-1}3+\cot^{-1}7+\cot^{-1}13+\cot^{-1}21).$

Solution

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See also

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