Search All of the Math Forum:
Views expressed in these public forums are not endorsed by
NCTM or The Math Forum.



Re: trig question
Posted:
Mar 11, 2006 2:28 PM


jennifer asked for a hint about: > f(x) = cos x + x > Find f^1(1) = ? and suggested: > I have to find f inverse
I think you have been distracted by a harder problem. This f inverse is not a nice function. Don't waste time looking for a formula for f^(1)(x).
Instead, concentrate on the meaning of f^(1)(1). [That ONE is significant, you are not asked for f^(1)(x), just f^(1)(1). The former is very hard, the latter is easy  even "guess and test"?]
 _ /\/ \ orewood@oLc.ubc.ca Beautiful British Columbia (Canada)



