Question

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

Answer 1

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:

Answer 2

Answer: D) - sqrt 2 - sqrt 2i

Step-by-step explanation: