Casio FX-991EX ClassWiz - Complex Number Conversion ( Polar to Rectangular and Vice- versa) - YouTube
Complex Numbers | fx-991EX can help you with engineering maths! Here's how you solve complex number. Click here to find out more >>>... | By CASIO Education SingaporeFacebook
Casio Classwiz Complex Mode - Input a complex number and find argument (Casio Calculator, 991EX) | Complex numbers, Calculator, Graphing calculator
CASIO fx-991EX - Dividing two complex numbers - YouTube
Complex Number - Using Casio fx-991EX Casswiz Scientific Calculator - YouTube