
Differential Equations Ordinary and Partial Differential Equations Math Forum 
 LinkBack  Thread Tools  Display Modes 
January 23rd, 2015, 07:41 PM  #11 
Math Team Joined: Dec 2013 From: Colombia Posts: 7,635 Thanks: 2620 Math Focus: Mainly analysis and algebra 
The original equation we were given.$$f(x+y) = {f(x)+f(y) \over 1  f(x)f(y)}$$ An example for which $x = \frac\pi2$ is not significant is $f(x) = \tan {x \over \pi}$. 
January 29th, 2015, 11:33 AM  #12 
Global Moderator Joined: Dec 2006 Posts: 20,469 Thanks: 2038 
For what values of $x$ and $y$?


Tags 
additional, diffeqs, formula, function, tangent 
Thread Tools  
Display Modes  

Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
Heat Equation with Additional Terms?  Traiken  Applied Math  1  November 28th, 2013 03:44 AM 
Derive Tangent add/sub formula. Double angle  yogazen2013  Trigonometry  1  September 6th, 2013 06:07 AM 
Solution needed for 7x7 Matrix/Sudoku (with additional restr  skavorn  Linear Algebra  0  April 28th, 2013 07:44 AM 
One additional question on the subject of the field axioms  Touya Akira  Abstract Algebra  2  February 23rd, 2011 12:06 AM 
tangent os power function  kannan19  Trigonometry  0  December 31st, 1969 04:00 PM 