How do I solve [Theta]23 from the following equation?

` 2 I \[Delta] Degree] (7 + Cos[8 \[Theta]12 Degree]) Cos[\[Theta]23 Degree]^2 Sec[ 2 \[Theta]12 Degree]^2 + 8 Exp[2 I \[Delta] Degree] Cos[\[Delta] Degree] Cos[\[Theta]12 \ Degree] Cos[\[Theta]23 Degree] Sin[\[Theta]12 Degree] Sin[\[Theta]13 \ Degree] Sin[\[Theta]23 Degree] - Sin[\[Theta]13 Degree] ((1 + 4 Exp[2 I \[Delta] Degree] + 2 Exp[4 I \[Delta] Degree] + Cos[4 \[Theta]12 Degree]) Sin[\[Theta]13 Degree] \ Sin[\[Theta]23 Degree]^2 - Exp[I \[Delta] Degree] (1 + Exp[2 I \[Delta] Degree] - 2 Cos[2 \[Theta]12 Degree]) Sin[2 \[Theta]12 Degree] Sin[ 2 \[Theta]23 Degree]))=0``` `