Question

Convert z = 9cos200° + 9isin200° from polar form to rectangular form.

-8.46 - 3.08i
-2.09 – 6.84i
8.46 + 3.08i
2.09 + 6.84i

Answer 1

z = -8.46 - 3.08i.

Explanation:

cos 200 = -0.93969 so 9 * cos 200 = -8.46 to the nearest hundredth.

sin 200 = -0.3420 so 9 * sin 200 = -3.08 to nearest hundredth.