MathDB
Tangents and Cotangents

Source:

December 22, 2005
trigonometryAMCAIME

Problem Statement

If tan⁡x+tan⁡y=25\tan x+\tan y=25 and cot⁡x+cot⁡y=30\cot x + \cot y=30, what is tan⁡(x+y)\tan(x+y)?
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