14.18 A short dipole-carrying current I, cos wt in the a, direction is located at the origin in free space. (a) If k = 1 rad/m, r = 2 m, 0 = 45°, p = 0, and t = 0, give a unit vector in rectangular...

Extracted text: 14.18 A short dipole-carrying current I, cos wt in the a, direction is located at the origin in free space. (a) If k = 1 rad/m, r = 2 m, 0 = 45°, p = 0, and t = 0, give a unit vector in rectangular components that shows the instantaneous direction of E. (b) What fraction of the total average power is radiated in the belt, 80° < 0=""><>