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OpenStudy (anonymous):
Write the complex number in trigonometric form. z=3i
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OpenStudy (unklerhaukus):
\[z=3i\]\[=3(\cos(\theta)+i\sin(\theta))\]\[=3(\cos(π/2)+i\sin(π/2)) \]\[=3i\sin(π/2)\]\[=3\text{cis}(π/2)\]
OpenStudy (unklerhaukus):
oh, and keep batmaning ,
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