
Math Software Math Software  Mathematica, Matlab, Calculators, Graphing Software 
 LinkBack  Thread Tools  Display Modes 
February 2nd, 2012, 07:14 PM  #1 
Newbie Joined: Feb 2012 Posts: 2 Thanks: 0  TI84 Plus Silver Edition
Hello, I am new member. May I ask a question? I have a TI84 Plus silver calculator. My math teacher reset my calculator before taking exam. When I brought home, the function of SIN, COS, TAN are mixed up. For example, when compute TAN(45) , it came out wrong value 1.645, it should be 1. It is the same when I computed SIN and COS. I need help this problem if anyone knows this. Thanks CN 
February 2nd, 2012, 07:42 PM  #2 
Senior Member Joined: Jul 2010 From: St. Augustine, FL., U.S.A.'s oldest city Posts: 12,131 Thanks: 437 Math Focus: Calculus/ODEs  Re: TI84 Plus Silver Edition
Hello, superway, Of course you may ask a question, that's what a forum is all about! The default mode for angles is radians, and when your calculator was reset that was the angle mode it defaulted to. You should have a mode key, which when pressed will allow you to change angles back to degrees. I'm not sure of the exact way to do this on your calculator, but on my TI89 Titanium, I press the mode key, then go down to angle and hit enter then choose between radians and degrees. If yours is substantially different, consult your user's manual for the correct procedure to change the angle mode. 
February 2nd, 2012, 07:54 PM  #3 
Newbie Joined: Feb 2012 Posts: 2 Thanks: 0  Re: TI84 Plus Silver Edition
Thanks MarkFL, It works.

February 2nd, 2012, 08:00 PM  #4 
Senior Member Joined: Jul 2010 From: St. Augustine, FL., U.S.A.'s oldest city Posts: 12,131 Thanks: 437 Math Focus: Calculus/ODEs  Re: TI84 Plus Silver Edition
Glad to hear it! I'm just curious, does your teacher allow you to upload your programs, etc. to a computer before resetting your calculator? I know when I was a student, I would have been very aggravated to lose all my programs and data. 

Tags 
edition, silver, ti84 
Search tags for this page 
Click on a term to search for related topics.

Thread Tools  
Display Modes  

Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
Mathematica Home Edition  questions  Sword7  Math Software  1  April 2nd, 2012 05:58 AM 
Principles of Economics 5th edition, Mankiw  Economics  0  July 3rd, 2011 10:17 AM  
TI84 Plus Silver Edition  superway  Algebra  1  January 1st, 1970 12:00 AM 