Question

Convert the complex number into its polar representation: -4i

Answer 1

\[complex no. is -4i=(0-4i)\]

Answer 2

polar representation is \[re^{i \theta}=r(\cos \theta+isin \theta)=rcos \theta+ri \sin \theta=x+iy=a complex no.\]
put the values u can do it

Answer 3

where \[r=\sqrt{x^2+y^2}\]

Answer 4

& \[\theta =\tan^{-1} (y/x)\]