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A comment on What are imaginary numbers?.

Re:What are imaginary numbers? by fchollet on Friday September 21, 2012 @12:23PM (#4554355)
The title statement is meaningless. "Imaginary numbers" are not "multiply" by "90°". What does it even mean to "multiply" by an angle?

Correct statement: "*i is equivalent to a 90° rotation in some contexts." Which is kind of obvious to anybody who has done some maths or physics at some point?

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Re:What are imaginary numbers? by walrus on Friday September 21, 2012 @12:44PM (#4554447)
Trivially, this result is clearly obvious.
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Re:What are imaginary numbers? by Tipzntrix on Friday September 21, 2012 @01:16PM (#4554644)
I swear the only time I ever heard trivial in a lecture was once I got into university. It's a whole new ball game; high school teachers wouldn't dare say trivial just in case they had someone who was behind.
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Re:What are imaginary numbers? by friendlyfrog on Friday September 21, 2012 @01:30PM (#4554725)
No it's not. i is a number such that i^2 = -1 by definition.
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Re:What are imaginary numbers? by gizmo686 on Saturday September 22, 2012 @03:07AM (#4557315)
And in some contexts -1 is rotating by 180 degrees, which happens to be 290, or i*i.
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