Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Sin^2 x + cos^2 x = 1

  1. Aug 24, 2006 #1
    What is the English word for this rule? It doesn't sound right if I do a direct translation and google didn't turn up much.

    Thank you :smile:
     
  2. jcsd
  3. Aug 24, 2006 #2
    (One of) The most famous trigonometric identity? ;) You'll generally find it in a list titled that way.
     
  4. Aug 24, 2006 #3

    Doc Al

    User Avatar

    Staff: Mentor

    I think it's called the Pythagorean identity.
     
  5. Aug 24, 2006 #4
  6. Aug 24, 2006 #5
    Thanks a lot, both of you. The name for it in my native language has been highly influenced by the number "1" :/
     
  7. Aug 24, 2006 #6
    What would it be called in your native language? In Danish it is readily called "Idiotformelen" -- the idiot formula...
     
  8. Aug 24, 2006 #7
    That was funny. It would be "trigonometriska ettan" or "(the) trigonometry 1"
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook