Art of Problem Solving

User contributions for Zhenqi

A user with 7 edits. Account created on 12 May 2014.
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9 December 2017

10 September 2017

29 June 2017

  • 15:5315:53, 29 June 2017 diff hist +617 N 1972 AHSME Problems/Problem 20 Created page with "We start by letting <math>\tan x = \frac{\sin x}{\cos x}</math> so that sour equation is now: <cmath>\frac{\sin x}{\cos x} = \frac{2ab}{a^2-b^2}</cmath> Multiplying through an..."

15 June 2017

13 May 2017