View original (French)

Issue with the arccos on my TI-COLLEGE-PLUS calculator

Yuki24 -  
 Link -
Hello everyone,
I’m coming to this forum to ask you a question. Indeed, I recently had a problem with my TI-COLLEGE-PLUS calculator: when I use the arccos() function and input, for example, the number 9, the calculator returns an error message that says "INVALID DOMAIN Error," but I can't understand where the problem comes from... could someone please help me?

1 answer

  1.
    julien_7324 Posted messages 109 Registration date   Status Member Last intervention   27
     
    Hello, I understand your mistake.
    In fact, you need to insert a number less than 1.
    For example, insert 0.9. You won't receive an error message.
    Now insert 1.1. There you will get the error message.
    3
    1. Link
       

      Thank you very much, you are saving my life

      2