Page 22 - Complex numbers

Example 6:

For any complex number A, the modulus and

argument are given by,

( )
2
2
√[ ( )] + [ ( )] and = tan −1 [ ]
( )
Your fx calculator is able to perform these calculations
and the following examples show how they can be

used in a multi-stage calculation.

For the following complex numbers, find their
modulus and argument.

1. (1.26 + 1.42 ) + (−4.8 + 1.83 )
2. (5.82 + 12.94 ) − (−0.58 + 16.23 )

3. (10.48 + 18.42 )(−4.14 + 15.92 )

4. (6.23+1.35 )
(−2.643+5.028 )

Let A be the first complex number and B be the second

complex number. The keystrokes for performing

these calculations are,

1

CQ(A)+Q(B)Q(:)Mq(CMPLX)3

17