1. ## xsinx inverse

hi..
I have a question about how to get the inverse of f(x)=xsinx
This is for my extra credit on AP Calc class
Thank you very much

2. Originally Posted by Kyaoo
hi..
I have a question about how to get the inverse of xsinx
This is for my extra credit on AP Calc class
Thank you very much
If $y = x\sin{x}$, then the inverse function is

$x = y\sin{y}$.

You can not isolate the y's.

3. ## hmm...

Actually, I also thought inverse of f(x)=xsinx does not exist; however, my math teacher sent e-mail back to me like this

"at minimum you should be able to define it -pi/2 to pi/2 at least. I know that it would be a very complex function to define the whole thing, but intervals I think should be possible."

4. What your teacher means is that you should be able to state the domain for which $f(x)$ is one-to-one, so that the function will have an inverse.

The inverse function IS defined as $x = y\sin{y}$ - I just haven't specified its domain... I'm just lazy...

5. I don't...really get it. Can you please show me how to get domain?
Thank you

6. Originally Posted by Kyaoo
hi..
I have a question about how to get the inverse of f(x)=xsinx
This is for my extra credit on AP Calc class
Thank you very much
If it's for extra credit then it's meant to be your own work, not someone elses. This thread has already told you what to do. Sorry but no more help can be given. Thread closed.

,

,

,

# what is the inverse of x sinx

Click on a term to search for related topics.