Write the complex number in trigonometric form, using degree measure for the argument.
--5
A) 5(cos 270° + i sin 270°)
B) 5(cos 90° + i sin 90°)
C) 5(cos 180° + i sin 180°)
D) 5(cos 0° + i sin 0°)

Question

Quizplus · Accepted Answer

The complex number -5 can be represented in trigonometric form as 5(cos 180° + i sin 180°) because it lies on the negative x-axis, which corresponds to an angle of 180°.

Write the Complex Number in Trigonometric Form, Using Degree Measure