Question

Principal argument Sin40+icos40

Answer 1

Answer:

Given , z=(sin40+icos40)5⇒z = (cos 50 + i sin 50)5⇒z = cos 250 + i sin 250⇒z = cos [360 − 110] + i sin [360−110]⇒z = cos 110  − i sin 110⇒z = cos (−110) + i sin (−110)So, amp z = −110°