Express 2(cos225 + i sin225) in the complex form a + bi

asked Sep 11, 2019 225k views

2 votes

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2(cos225 + i sin225) can be rewritten as

2(- 1 / √2 - i / √2) = 2(1/√2 [1+i]) = √2(1+i) or √2 + i√2

Rationalize the denominator next:

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4 votes

Answer: D) - sqrt 2 - sqrt 2i

Step-by-step explanation:

Sosel answered Sep 15, 2019

by Sosel

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