Question Number 25823 by ajfour last updated on 15/Dec/17
$${z}_{\mathrm{1}} =\mathrm{4}−\mathrm{3}{i} \\ $$$${z}_{\mathrm{2}} =\mathrm{9}+\mathrm{2}{i} \\ $$$${Find}\:\:\left({a}\right)\:{z}_{\mathrm{1}} {oz}_{\mathrm{2}} \\ $$$$\:\:\:\:\:\:\:\:\:\:\:\:\:\left({b}\right)\:{z}_{\mathrm{1}} ×{z}_{\mathrm{2}} \\ $$$$\:\:\:\:\:\:\:\:\:\:\:\:\:\:\left({c}\right)\:{angle}\:{between}\:{z}_{\mathrm{1}} {and}\:{z}_{\mathrm{2}} . \\ $$
Commented by ajfour last updated on 16/Dec/17
$${if}\:{by}\:\:{z}_{\mathrm{1}} {oz}_{\mathrm{2}} \:{it}\:{is}\:{meant}\:{dot} \\ $$$${product}\:{of}\:{z}_{\mathrm{1}} \:{and}\:{z}_{\mathrm{2}} \:. \\ $$