My Math Forum fundamental subtraction question

 Algebra Pre-Algebra and Basic Algebra Math Forum

 September 29th, 2018, 09:26 AM #1 Member   Joined: Jul 2018 From: Germany Posts: 37 Thanks: 1 fundamental subtraction question I have: sin(e-c) c=e+a now is it: sin(e - e+a) or sin(e + -1*(e+a)) = sin(e - e -a) it has to be the latter right?
 September 29th, 2018, 09:34 AM #2 Senior Member   Joined: Jun 2015 From: England Posts: 915 Thanks: 271 Yes the last is correct, but you don't need the 1 multiplier. Just use brackets. Sin(e-c) where c = [e+a] is Sin(e-[e+a]) = sin(e-e+a) = sin(a) Thanks from theHeavyLobster
 September 30th, 2018, 11:16 AM #3 Senior Member   Joined: Jun 2015 From: England Posts: 915 Thanks: 271 Oops I really don't deserve that thanks as I posted the wrong thing. But it was a good job it came up since I can now apologise and correct my mistake. Sin(e-[e+a]) = sin(e-e-a) = sin(-a) Not Sin(e-[e+a]) = sin(e-e+a) = sin(a) as I originally wrote. It is very important to realise that the minus sign before a bracket changes every sign in the bracket.
September 30th, 2018, 02:44 PM   #4
Math Team

Joined: Oct 2011

Posts: 14,597
Thanks: 1038

Quote:
 Originally Posted by studiot Oops.....
Should be "whoops"!

September 30th, 2018, 04:19 PM   #5
Senior Member

Joined: Feb 2016
From: Australia

Posts: 1,838
Thanks: 653

Math Focus: Yet to find out.
Quote:
 Originally Posted by Denis Should be "whoops"!
https://www.merriam-webster.com/dictionary/oops?show=0

https://www.merriam-webster.com/dictionary/whoops

 September 30th, 2018, 05:16 PM #6 Math Team   Joined: Oct 2011 From: Ottawa Ontario, Canada Posts: 14,597 Thanks: 1038 It's still "whoops" out here !
September 30th, 2018, 05:44 PM   #7
Senior Member

Joined: May 2016
From: USA

Posts: 1,310
Thanks: 551

Quote:
 Originally Posted by Denis It's still "whoops" out here !
Denis lives in the Canadian equivalent of West Virginia: it takes a while for linguistic innovations to percolate into the more distant hollows. They still use "thou," "thee," "thy," and "thine" out there.

 September 30th, 2018, 05:49 PM #8 Math Team   Joined: Oct 2011 From: Ottawa Ontario, Canada Posts: 14,597 Thanks: 1038 ...plus they drink "spots of tea"....
September 30th, 2018, 05:52 PM   #9
Senior Member

Joined: May 2016
From: USA

Posts: 1,310
Thanks: 551

Quote:
 Originally Posted by Denis ...plus they drink "spots of tea"....
Not among the whoopies (western PA slang for West Virginians): they drink white lightning and Mountain Dew, an almost lethal concoction.

 September 30th, 2018, 06:01 PM #10 Math Team   Joined: Oct 2011 From: Ottawa Ontario, Canada Posts: 14,597 Thanks: 1038 Oh ya...google "caribou whiskey".... or: Caribou noun 1.Canadian a mixed drink containing wine and grain alcohol Thanks from JeffM1 Last edited by Denis; September 30th, 2018 at 06:05 PM.

 Thread Tools Display Modes Linear Mode

 Similar Threads Thread Thread Starter Forum Replies Last Post mathz Elementary Math 6 February 11th, 2015 11:14 PM chomool Linear Algebra 1 February 17th, 2013 12:49 PM thapchi Calculus 3 November 30th, 2012 10:18 AM gaussrelatz Calculus 1 October 25th, 2011 11:27 PM gaussrelatz Algebra 1 December 31st, 1969 04:00 PM

 Contact - Home - Forums - Cryptocurrency Forum - Top