# Thread: Derivative of Inverse Hyperbolic Tan

1. ## Derivative of Inverse Hyperbolic Tan

I thought that the derivative of inverse hyperbolic tan was:

If so, how can the following statement be true?

Does it not matter if the sign in the denominator is positive or negavive? Thanks in advance!

2. tan or tanh ...?

3. Guess I'll chalk that one up to Monday morning...thanks!