SOLUTION: Express 4(cos 3pi/4 + i sin 3pi/4)in rectangular form.

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Question 344695: Express 4(cos 3pi/4 + i sin 3pi/4)in rectangular form.
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
Express 4(cos 3pi/4 + i sin 3pi/4)in rectangular form.
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x = 4cos(3pi/4) = 4(-sqrt(2)/2 = -2sqrt(2) = -2.8284
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y = 4sin(3pi/4) = 4(sqrt(2)/2) = 2sqrt(2) = 2.8284
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Ans: -2.8294+2.8284i
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Cheers,
Stan H.