I feel dumb asking this, but I cant get the right answer... Write in Trigonometric form 9.6-5.5i
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I think you require given $\displaystyle z = a+bi$ then $\displaystyle z = \sqrt{a^2+b^2}~\text{cis}\left(\tan^{-1}\left(\frac{b}{a}\right)\right)$
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