How to solve [tan(ln(x))]^2 = -1 ?

[lvl107]

  Hello, Everyone

  How to solve [tan(ln(x))]^2 = -1 ?

      Thanks in advance.

            Regards.

[Werner_E]

  How to solve [tan(ln(x))]^2 = -1 ?

Why do you think that this equation is solvable? It is not!! No solution exists!

Because tan(x)=i has no solution!  atan(i) is undefined (singularity).

[lvl107]

But I still guess :

Furthermore :

                Regards.

[Werner_E · Accepted solution]

There is no solution!

Why do you think that this is a solution??? Its obviously not:

[lvl107]

Oh, I'm wrong because :

            Best Regards.

[-MFra-]

Hi Loi Le,

I'm sorry, Ivn't reed the other answers.