September 29th, 2018, 09:26 AM  #1 
Member Joined: Jul 2018 From: Germany Posts: 34 Thanks: 1  fundamental subtraction question
I have: sin(ec) 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: 891 Thanks: 269 
Yes the last is correct, but you don't need the 1 multiplier. Just use brackets. Sin(ec) where c = [e+a] is Sin(e[e+a]) = sin(ee+a) = sin(a) 
September 30th, 2018, 11:16 AM  #3 
Senior Member Joined: Jun 2015 From: England Posts: 891 Thanks: 269 
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(eea) = sin(a) Not Sin(e[e+a]) = sin(ee+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 From: Ottawa Ontario, Canada Posts: 14,124 Thanks: 1003  
September 30th, 2018, 04:19 PM  #5 
Senior Member Joined: Feb 2016 From: Australia Posts: 1,769 Thanks: 626 Math Focus: Yet to find out.  
September 30th, 2018, 05:16 PM  #6 
Math Team Joined: Oct 2011 From: Ottawa Ontario, Canada Posts: 14,124 Thanks: 1003 
It's still "whoops" out here !

September 30th, 2018, 05:44 PM  #7 
Senior Member Joined: May 2016 From: USA Posts: 1,310 Thanks: 550  
September 30th, 2018, 05:49 PM  #8 
Math Team Joined: Oct 2011 From: Ottawa Ontario, Canada Posts: 14,124 Thanks: 1003 
...plus they drink "spots of tea"....

September 30th, 2018, 05:52 PM  #9 
Senior Member Joined: May 2016 From: USA Posts: 1,310 Thanks: 550  
September 30th, 2018, 06:01 PM  #10 
Math Team Joined: Oct 2011 From: Ottawa Ontario, Canada Posts: 14,124 Thanks: 1003 
Oh ya...google "caribou whiskey".... or: Caribou noun 1.Canadian a mixed drink containing wine and grain alcohol Last edited by Denis; September 30th, 2018 at 06:05 PM. 

Tags 
fundamental, question, subtraction 
Thread Tools  
Display Modes  

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