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PSAT Math Test - Calculator Section

Polar Form of a Complex Number

Very Easy Additional Topics In Math Complex Numbers

What is the value of the complex number $$3 + 4i$$ when expressed in polar form?

$$5 \left(\cos \frac{3\pi}{4} + i \sin \frac{3\pi}{4}\right)$$

$$5 \left(\cos \frac{5\pi}{4} + i \sin \frac{5\pi}{4}\right)$$

$$5 \left(\cos \frac{3\pi}{2} + i \sin \frac{3\pi}{2}\right)$$

$$5 \left(\cos \frac{\pi}{4} + i \sin \frac{\pi}{4}\right)$$

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