Engineering Board Exam Reviewer · Complex Numbers: Polar and Exponential Form · medium

Divide using polar form: 12, cis,80°4, cis,20°

1. 3, cis,60°
2. 3, cis,100°
3. 8, cis,60°
4. 48, cis,60°

Answer

A. 3, cis,60°

Solution

Divide the magnitudes and subtract the angles: 12/4, cis(80°-20°)=3, cis,60°.

More Complex Numbers: Polar and Exponential Form questions

1. Use De Moivre's Theorem to find (2, cis,30°)3.
2. Write 4+4i in polar form.
3. Convert 10 60° to rectangular form.
4. Find the polar form of -3+3i.
5. Multiply using polar form: (2, cis,30°)(3, cis,60°)

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