is cos(arccos(t))  = t ??

Posted on 2007-03-17
Last Modified: 2008-01-09
i working on some partial derivatives and ran into


is it equal to t ?

also is it correct to say arccos(cos(t)) = t ??

any ideas?
Question by:c_hockland
  • 3
LVL 84

Expert Comment

ID: 18741895
It could also be -t or t+2pi
LVL 84

Expert Comment

ID: 18741905
cos(arccos(t)) = t
arccos(cos(t)) = n*2*pi ± t

Author Comment

ID: 18741910
having said that ,

tan(arctan(t)) = t right ?

thanks Ozo.
LVL 84

Accepted Solution

ozo earned 500 total points
ID: 18741935

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