Help please.

I have the equation tanh(X) = T . e^(jf)

tanh - is hyperbolic tang.

X is complex number X = a +jb

T.e^(jf) - is a known complex number = T.cos(f)+j.T.sin(f)

I need clear decision for a=? and b=?

a - real part

b - imaginary part

only like function ofTanff.