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pre calc help please?

4/3 (cos 5pi/4 + i sin 5pi/4)
multiplied by
3 (cos pi/4 + i sin pi/4)

2007-12-18 08:50:02 · 1 answers · asked by snowangels 2 in Science & Mathematics ➔ Mathematics

1 answers

when you multiply the two numbers, you multiply the r and add the theta

4(cos 3pi/2 + i sin 3pi/2)
-4i

2007-12-18 08:57:51 · answer #1 · answered by norman 7 · 0⤊ 0⤋

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