MathDB
Math Prize 2014 Problem 16

Source:

September 29, 2014
trigonometryLaTeXvectorgeometrycomplex numbers

Problem Statement

If sinx+siny=9665\sin x + \sin y = \frac{96}{65} and cosx+cosy=7265\cos x + \cos y = \frac{72}{65}, then what is the value of tanx+tany\tan x + \tan y?