My Math Forum  

Go Back   My Math Forum > High School Math Forum > Trigonometry

Trigonometry Trigonometry Math Forum

Thanks Tree3Thanks
  • 1 Post By Denis
  • 1 Post By skipjack
  • 1 Post By Compendium
LinkBack Thread Tools Display Modes
January 14th, 2017, 12:41 AM   #1
Joined: Jan 2017
From: Israel

Posts: 1
Thanks: 0

Monstrous equation

Hi, I am working on a great (and heavy) paper that relate to trigo, geometry, and algebra, and I got the following equation:

It is an equation with 4 unknowns, and I do not need to solve it, I just need to know if it a false or true expression.

Can anybody give me a direction? I kind of tried everything, and it does not go pretty well for me by now.


Last edited by yairmrm; January 14th, 2017 at 12:53 AM.
yairmrm is offline  
January 14th, 2017, 01:27 AM   #2
Senior Member
Joined: Feb 2016
From: Australia

Posts: 1,737
Thanks: 606

Math Focus: Yet to find out.
You can't of tried everything otherwise you would have solved the problem .

Surely you can plug it into Wolfram?
Joppy is online now  
January 14th, 2017, 08:17 AM   #3
Senior Member
Joined: May 2016
From: USA

Posts: 1,206
Thanks: 494

What does "true or false expression" even mean?

As for solving the equation, it has multiple unknowns so it either has an infinite number of solutions or no solutions.

One thing you might try is to assign values to all the unknowns but one and try to solve the resulting equation in one unknown. Such an experiment might indicate what kind of bounds must be placed on the unknowns to permit any solution.
JeffM1 is online now  
January 14th, 2017, 08:21 AM   #4
Senior Member
romsek's Avatar
Joined: Sep 2015
From: USA

Posts: 2,200
Thanks: 1156

looks like stuff straight out of spherical trigonometry, have you looked into that?
romsek is offline  
January 14th, 2017, 11:51 AM   #5
Math Team
Joined: Oct 2011
From: Ottawa Ontario, Canada

Posts: 13,602
Thanks: 954

Solved it in my head during my walk, wrote solution
on back of my cigarette back, but unfortunately threw
the pack away (only 1 cancer stick was left), so
can't help....solly, very solly...
Thanks from Joppy
Denis is online now  
January 14th, 2017, 12:48 PM   #6
Global Moderator
Joined: Dec 2006

Posts: 19,963
Thanks: 1849

I think the equation would be an identity if you changed the sign of one side and excluded values of the variables that would cause any denominator to be zero.
Thanks from topsquark
skipjack is offline  
January 14th, 2017, 06:39 PM   #7
Senior Member
Compendium's Avatar
Joined: Sep 2007
From: USA

Posts: 349
Thanks: 67

Math Focus: Calculus
Skipjack is correct. I looked at both sides of the equation after Maxima fully simplified it, and they do not appear to be equal. They differ by a sign.
Thanks from topsquark

Last edited by Compendium; January 14th, 2017 at 06:53 PM.
Compendium is offline  

  My Math Forum > High School Math Forum > Trigonometry

equation, monstrous

Thread Tools
Display Modes

Similar Threads
Thread Thread Starter Forum Replies Last Post
Need help factoring this monstrous problems App Elementary Math 4 June 27th, 2015 04:25 PM
Equation jump in graphical algebra equation DarkX132 Algebra 3 September 26th, 2014 11:15 PM
Gompertz equation - differential equation Sonprelis Calculus 6 August 6th, 2014 11:07 AM
Show that an equation satisfies a differential equation PhizKid Differential Equations 0 February 24th, 2013 11:30 AM
simplify equation to get a quadratic equation mich89 Algebra 3 January 9th, 2013 02:22 PM

Copyright © 2018 My Math Forum. All rights reserved.