the imaginary i or j which is ewuivalent to square root of -1 has a phase difference of ____ with real number 1. what's the answer? 0,45,90,180, or 360? and why?

Answer 1

hint:
1 is on the +x-axis
i is on the +y-axis.

How far do you have to rotate the +x direction to point in the +y direction?

Answer 2

i don't know there are given choices of a.) 0 degrees, along or within the force. b.)90 degrees. c.) 360 degrees, one complete revolution d.) 180 degrees. e.) 45 degrees, horizontal and vertical component or equal

Answer 3

oh, come on. You can draw x- and y-axes, surely? They meet at a right angle. How many degrees is that?

Just place a pencil pointing out the +x axis, and rotate it till it points upward along the y-axis. You must surely know how many degrees that is. If not, you are in for a bumpy ride.