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Problem with cosine calculation on TI 83+

rg60 -  
 ROMAN -
Hello,

I have a TI 83 + and I want to perform a calculation on it, but I have a small problem. I'm trying to enter the cosine of 30°. The statement indicates that I should get 0.86, but when I type cos(30), I get 0.154. I think there might be a setting issue... or I'm not using the correct process...

Can you help me?

Thank you in advance.
Configuration: Windows Vista Internet Explorer 7.0

4 answers

  1.
    Mergez Posted messages 142 Status Member 36
     
    Is your calculator in degrees or radians? If you don't know, look for the mode button and what's highlighted in black indicates the correct mode.

    Cod30 = approximately 0.86, you need to be in DEGREES.
    41
    1. ROMAN
       
      Thank you very much for your response, it was indeed the radian/degree issue.
      1
  2. tcent Posted messages 405 Status Member 55
     
    xd are you sure you are in the right place :)

    check you should be in radians or the statement is incorrect
    it doesn't come from the calculator
    1
  3. tcent Posted messages 405 Status Member 55
     
    lol ok be careful on the day of your exams ;)
    see you later
    1
  4. Mergez Posted messages 142 Status Member 36
     
    he is in radians for that. All that's left is to change the mode and set it to DEGREES
    0