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February 28th, 2018, 03:00 AM  #1 
Newbie Joined: Feb 2018 From: Diepenbeek, Limburg, Belgium Posts: 2 Thanks: 0  Simplify Trigonometric Quotient
I have a hard time simplifying a math problem. (cosx+cos2x+cos3x) / (sinx+sin2x+sin3x) (and xeR) Can somebody help me out with this? Thanks!! Last edited by skipjack; February 28th, 2018 at 08:28 PM. 
February 28th, 2018, 04:55 PM  #2 
Global Moderator Joined: May 2007 Posts: 6,558 Thanks: 602 
Try reducing everything to combinations of sinx and cosx.

February 28th, 2018, 08:25 PM  #4 
Global Moderator Joined: Dec 2006 Posts: 19,291 Thanks: 1683  Code: cos(x) + cos(2x) + cos3x) cos(2x) + 2cos(2x)cos(x)  =  = cot(2x) sin(x) + sin(2x) + sin(3x) sin(2x) + 2sin(2x)cos(x) 

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math, quotient, school, simplify, task, trigonometric 
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