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write each complex number in rectangular form round to nearest 10th?

7(cos3pie/2 +i sin 3pie/2)

2007-11-24 15:48:17 · 2 answers · asked by danahen2000 1 in Science & Mathematics ➔ Mathematics

2 answers

cos(3 pi/2 ) = 0
sin (3 pi/2 ) = -1
z = -7i

2007-11-24 15:55:49 · answer #1 · answered by norman 7 · 0⤊ 0⤋

cos3pi/2=0
sin3pi/2=-1
multiply 7 into the above
-7i

2007-11-24 16:21:10 · answer #2 · answered by someone else 7 · 0⤊ 0⤋

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