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I got number 2 wrong, could you help me choose the correct answer? (L93) A complex number z = a + bi can be written

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I got number 2 wrong, could you help me choose the correct answer?

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(L93) A complex number z = a + bi can be written in polar (trigonometric) form as where r is the modulus and O is the argument. A. z =r+0 B. z= r(cos 0 + isin 0) C. z= & D. z = r(tan0 + icot0) E. None of the above

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