You can
put this solution on YOUR website!Use the Argand plane where multiplication
is done by multiplying amplitudes and adding
angles of the rotating vectors

=

angle 30 degrees

angle 30 degrees =

angle 30 degrees

=

angle 90 degrees

angle 90 degrees =

angle

degrees

angle 90 degrees =

angle 90 degrees
It is best to draw this. The advantage is that the exponent could
be any size and you just add angles and raise 1 number to a power