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(Solved): if you could clear clarify. Why your doing what your doing. And what equations you are using and why ...
Express the complex number \( z=-4 \sqrt{2}-4 \sqrt{2} i \) in polar form \( r \) cis \( \theta \). Select the correct answer below: \( 16 \operatorname{cis} 45^{\circ} \) \( 16 \operatorname{cis} 135^{\circ} \) \( 8 \operatorname{cis} 45^{\circ} \) \( 8 \operatorname{cis} 225^{\circ} \) \( 8 \operatorname{cis} 135^{\circ} \) \( 16 \operatorname{cis} 225^{\circ} \)
Expert Answer
Note that the given complex number is z=?42?42i which in point form becomes (?42,?42). Now as the point (?42,?42) is in Quadrant III, then we have, 18