Question #35062 Precalculus Complex Numbers in Trigonometric Form Complex Number Plane 1 Answer Eddie Apr 17, 2017 For z = x + i y, we have Im(z) = y,....., not iy. The imaginary part of a complex number is not imaginary. So: -3.13i xx -1.06i =-( -3.13 xx -1.06 ) But: Im(-3.13i) xx Im(-1.06i) = -3.13 xx -1.06 And generally: Im(x+iy) xx Im(u + i v) = yv Answer link Related questions What is the complex number plane? Which vectors define the complex number plane? What is the modulus of a complex number? How do I graph the complex number 3+4i in the complex plane? How do I graph the complex number 2-3i in the complex plane? How do I graph the complex number -4+2i in the complex plane? How do I graph the number 3 in the complex number plane? How do I graph the number 4i in the complex number plane? How do I use graphing in the complex plane to add 2+4i and 5+3i? How do I use graphing in the complex plane to subtract 3+4i from -2+2i? See all questions in Complex Number Plane Impact of this question 1233 views around the world You can reuse this answer Creative Commons License