
Algebra PreAlgebra and Basic Algebra Math Forum 
 LinkBack  Thread Tools  Display Modes 
November 14th, 2016, 05:36 AM  #1 
Newbie Joined: Nov 2016 From: Slovenia Posts: 24 Thanks: 0  Decide whether α must be a rational number. Completely don't know how to do it...
Let $\alpha$ be a real number such that tan($\alpha$ · $\pi$) = √2. Decide whether $\alpha$ must be a rational number.
Last edited by skipjack; November 14th, 2016 at 08:03 AM. 
November 14th, 2016, 12:23 PM  #2 
Senior Member Joined: Sep 2015 From: USA Posts: 2,373 Thanks: 1276 
what class is this for? It seems a deeper problem than basic algebra. 
November 14th, 2016, 01:08 PM  #3 
Newbie Joined: Nov 2016 From: Slovenia Posts: 24 Thanks: 0 
I don't know. I just found it.


Tags 
completely, completly, decide, number, rational 
Thread Tools  
Display Modes  

Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
The Least Rational Number there is?  v8archie  Real Analysis  3  December 19th, 2015 12:24 AM 
rational number  Roli  Algebra  14  June 10th, 2014 01:40 AM 
Rational number  tva_vlad  Algebra  1  October 7th, 2013 01:38 AM 
Rational number  goodfeeling  Algebra  17  October 26th, 2012 12:40 PM 
Prove a rational number???  samuraibob  Algebra  5  August 2nd, 2010 11:45 PM 