MathDB

13

Part of 1984 AIME Problems

Problems(1)

Trig Computation

Source:

12/19/2005
Find the value of 10cot⁡(cot⁡−13+cot⁡−17+cot⁡−113+cot⁡−121)10\cot(\cot^{-1}3+\cot^{-1}7+\cot^{-1}13+\cot^{-1}21).