Question Number 138236 by mohammad17 last updated on 11/Apr/21
$${prove}\:{that}\: \\ $$ $$ \\ $$ $$\frac{{e}^{−\mathrm{2}{y}} }{\mathrm{1}+{e}^{−\mathrm{2}{y}} }<\mid{tan}\left({z}\right)\:−\:{i}\mid<\frac{{e}^{−\mathrm{2}{y}} }{\mathrm{1}−{e}^{−\mathrm{2}{y}} }\:\:\:,{y}>\mathrm{0} \\ $$ $$ \\ $$ $${how}\:{can}\:{solve}\:{this}\:? \\ $$
Commented bymr W last updated on 11/Apr/21
$${you}\:{can}\:{not}\:{compare}\:{two}\:{complex} \\ $$ $${numbers}.\:{do}\:{you}\:{mean}\:\mid{tan}\left({z}\right)\:−\:{i}\mid? \\ $$
Commented bymohammad17 last updated on 11/Apr/21
$${yes}\:{yes}\:{sory}\:{sir} \\ $$
Commented bymohammad17 last updated on 11/Apr/21
$${can}\:{you}\:{solve}\:{this}\:{sir} \\ $$
Commented bymr W last updated on 11/Apr/21
$${with}\:{z}={x}+{yi}\:? \\ $$
Commented bymohammad17 last updated on 11/Apr/21
$${yes}\:{sir}\:{can}\:{you}\:{help}\:{me}\:{please} \\ $$