Write the complex number in trigonometric form, using degree measure for the argument.
--3.33 + 4.30i
A) 5.4(cos -52.2° + i sin -52.2°)
B) 5.4(cos 37.8° + i sin 37.8°)
C) 5.4(cos 217.8° + i sin 217.8°)
D) 5.4(cos 127.8° + i sin 127.8°)

Question

Quizplus · Accepted Answer

The modulus is √((-3.33)² + (4.30)²) = 5.4. The argument is arctan(4.30/-3.33) which is in the second quadrant, giving 127.8°.

Write the Complex Number in Trigonometric Form, Using Degree Measure