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Sin^2 x + cos^2 x = 1

  • Thread starter Mattara
  • Start date
345
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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:
 
2,036
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(One of) The most famous trigonometric identity? ;) You'll generally find it in a list titled that way.
 

Doc Al

Mentor
44,741
1,031
I think it's called the Pythagorean identity.
 
345
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Thanks a lot, both of you. The name for it in my native language has been highly influenced by the number "1" :/
 
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What would it be called in your native language? In Danish it is readily called "Idiotformelen" -- the idiot formula...
 
345
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That was funny. It would be "trigonometriska ettan" or "(the) trigonometry 1"
 

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