Difference between revisions of "1984 AIME Problems/Problem 13"
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== Problem == | == Problem == | ||
| + | Find the value of <math>\displaystyle 10\cot(\cot^{-1}3+\cot^{-1}7+\cot^{-1}13+\cot^{-1}21).</math> | ||
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== Solution == | == Solution == | ||
{{solution}} | {{solution}} | ||
Revision as of 00:40, 21 January 2007
Problem
Find the value of 
Solution
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