# What is the inverse function of x + sin x ?

1. Aug 10, 2015

### arpon

What is the inverse function of $x+sin x$ ?

2. Aug 10, 2015

### laplacean

It appears to be an inverse that cannot be found using conventional means. If you're up for it, you could try the Langrange inversion theorem.

3. Aug 10, 2015

### Student100

There isn't one in elementary functions.