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OpenStudy (anonymous):
how do you do this problem...: find z x w z=6(cos3π/2+i3π/2) w=12(cos5π/6+isin5π/6)
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OpenStudy (anonymous):
do you know?
OpenStudy (anonymous):
ultiply rthem i know that!
OpenStudy (tkhunny):
Do you have De Moivre?
OpenStudy (anonymous):
yeah the formula?
OpenStudy (tkhunny):
Right. It should show you the way. \((a\cdot cis(\theta))\cdot (b\cdot cis(\phi)) = ??\)
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OpenStudy (anonymous):
ok thanks
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