Perform the indicated operations for the resulting complex numbers if the given changes are made in the indicated examples of this section.

In Example 1, change the sign of the angle in the first complex number and then perform the multiplication.

Data from Example 1

To multiply the complex numbers 3.61∠56.3° and 1.41∠315.0° , we have

multiply (3.61/56.3)(1.41/315.0) = (3.61)(1.41)/56.3 +315.3 add = 5.09/371.3 = 5.09/11.3