text/scalc/01/func_imtan.xhp

IMTAN function tangent;complex number IMTAN function Returns the tangent of a complex number. The tangent of a complex number can be expressed by:

tan(a+bi)=sin(a+bi)/cos(a+bi) IMTAN(Complex_number) Complex_number is a complex number whose tangent is to be calculated.

=IMTAN("4-3i")
returns 0.00490825806749606-1.00070953606723i. =IMTAN(2)
returns -2.18503986326152 as a string.