SOLUTION: (-3+3i)•(cos45+i sin 45)

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Question 563177: (-3+3i)•(cos45+i sin 45)
Answer by solver91311(24713) About Me  (Show Source):
You can put this solution on YOUR website!


I'm going to assume you meant and , otherwise this problem is a big ugly mess.

Use the unit circle:



to determine that .

Substitute and the use FOIL. Don't forget that . Collect terms.

John

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