I have to rewrite the following to polar form: re^iθ (θ is in radian).

- 2∠30°

I think that I have to use this: r*cos(θ) + i * sin(θ)

Please help!

Guest Jan 29, 2015

#1**+5 **

I think it is

$$\\2e^{i\pi/6}\\\\

=2(cos\frac{\pi}{6}+isin\frac{\pi}{6})\\\\

=2(\frac{\sqrt3}{2}+i*\frac{1}{2})\\\\

=\sqrt3+i$$

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You do not need this pic to answer the question but I think it may help you to understand

Melody
Jan 30, 2015

#2**+5 **

Thanks for the help.

I just dont understand why you use π/6?

How do you know that θ = π/6?

Guest Jan 30, 2015