1. Precalculus
9-7 Products and Quotients of Complex Numbers in Polar Form
Formula for the Product of Complex Numbers in Polar Form:
 7π 7π   2π 2π 
EX1: Find the product 3  cos + ισιν  γ2  χοσ + ι σιν  . Then express the
 6 6   3 3
product in rectangular form.
Quotient of Complex Numbers in Polar Form:
Note:
• The modulus of the quotient is the _____________________ of the original two
moduli.
• The amplitude of the quotient is the ______________________ of the amplitudes.

2.  π π  3π 3π 
EX2: Find the quotient 12  cos + ι σ  ÷ 4  χοσ + ι σ
ιν ιν  . Then express the
 4 4   2 2 
quotient in rectangular form.
HW p. 596 (10 – 18 even)