+0  
 
0
1229
4
avatar+35 
I already know the answer to this, I'm just spreading it to the world. If you do not understand the concepts of i as the principal square root of -1, or the trigonometric sign cosine, you won't understand this. So, the question is: what is the cosine of i (in radians)? If you do find the answer, you will see why it is weird. If you find the answer, leave it as a(n) answer/comment. First one to answer wins.



Sorry that it was posted twice it's a long story
 May 17, 2012
 #1
avatar+35 
0
Comment "Help" if you would like a hint.
 May 17, 2012
 #2
avatar
0
that makes plenty of sense. thank you.
 May 17, 2012
 #3
avatar+35 
0
Hint: You can't find it exactly, but to get reasonably close, use the power series expansion for cosine of x, and plug in i for x.
 May 21, 2012
 #4
avatar+35 
0
The winner gets money.
 May 21, 2012

3 Online Users