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20-08-2020
Mathematics

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Graph Z=3cos315+3isin315 explain where you would find this equation on a complex plane

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27-08-2020

Answer:

cos 315° = 45° reference angle in the 4th quadrant = √2 /2

And sin 315° is the negative of this

So

z = (3) cos 315° + ( 3i ) sin 315° =

[ (3/2)√2 , - (3/2) √2 i ]

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