# complex numbers

posted by
**kevin** on
.

-3 + 4i in polar form in pi

the magnitude is 5 from pyth theorm. Now the angle. Using i the positive real as the reference axis, the angle from it is PI/2 + arctan4/3

posted by
**kevin** on
.

-3 + 4i in polar form in pi

the magnitude is 5 from pyth theorm. Now the angle. Using i the positive real as the reference axis, the angle from it is PI/2 + arctan4/3