English maths problems about Complex numberExpress the follwing plex numbers in polar form(a)2 (b)-4 (c) 3i (d) -2i Is there anyone can give me detail answersThanks for helping me love u
网友回答
(a) 2=2+0*i=2*cos0°+2*sin0°i
polar form:2∠0°
(b)-4 = 4*cos180°+4*sin180°i
polar form:4∠180°
(c)3 = |3i|sina,0=|3i|cosa,a = 90°,|3i|=3
polar form:3∠90°
(d)-2=|-2i|sina,0=|-2i|cosa,a=-90°,|-2i|=2
polar form:2∠-90°
======以下答案可供参考======
供参考答案1:
2(cosO+isinO) -4(cosO+isinO) 3(cos派/2+isin派/2) -2(cos派/2+isin派/2)
供参考答案2:
sorry!