如何将 1- i 转换为极坐标形式?
复数是实数和虚数的组合。它有两个组成部分或部分,仅由实数(任何分数、小数、根号或整数)组成的部分称为实部,由 iota (i = √(-1)) 组成的部分称为虚部。
复数的矩形形式
表示复数的矩形形式或标准形式是最常用的复数书写方式。如下图所示:
z = a + ib,
其中 a 和 b 是任何实数(负或非负整数、小数、小数等),i 是虚部,i = √(-1)。下面给出的维恩图是复数的实部和虚部的示例。
复数的极坐标形式
除了标准形式之外,表示复数的另一种方法称为极坐标形式。复数的极坐标形式使用其模数(绝对值)以及自变量作为其组成部分。复数的实部和虚部的坐标构成了它的极坐标形式。对于复数 z = x + iy,其极坐标形式的方程如下:
z = r(cosθ + isinθ)
其中 r 是给定复数的模数,由 r = θ 是给定复数的自变量,对于所有 x > 0,由 tan -1 (y/x) 给出。
如何将 1- i 转换为极坐标形式?
解决方案:
Given: z = 1 – i
Comparing this with z = x + iy, Therefore, x = 1 and y = -1.
Modulus = r =
Argument = tan-1{-1/1} = tan-1{tan(-π/4} = -π/4
Thus, polar form of 1 – i =
类似问题
问题 1:将 7 – 5i 转换为极坐标形式。
解决方案:
Given, z = 7 – 5i
Comparing this with z = x + iy, Hence, x = 7 and y = -5.
Modulus = r =
Argument = tan-1{5/7} = tan-1{tan(360° – 35.54°} = 324.46°
Thus, polar form of 7 – 5i =
问题 2:将 3 + 5i 转换为极坐标形式。
解决方案:
Given, z = 3 + 5i
Comparing this with z = x + iy, Therefore, x = 3 and y = 5.
Modulus = r = = 5.831
Argument = tan-1{5/3} = 59.036°
Thus, polar form of 3 + 5i = 5.8[cos(59.036°) + isin(59.036°)].
问题 3:将 12 + 10i 转换为极坐标形式。
解决方案:
Given, z = 12 + 10i
Comparing this with z = x + iy, Therefore, x = 12 and y = 10.
Modulus = r = = 15.62
Argument = tan-1{10/12} = 39.8°
Thus, polar form of 12 + 10i = 15.62[cos(39.8°) + isin(39.8°)].
问题 4:将 69 + 420i 转换为极坐标形式。
解决方案:
Given, z = 69 + 420i
Comparing this with z = x + iy, Therefore, x = 69 and y = 420
Modulus = r = = 425.6
Argument = tan-1{420/69} = 80.67°
Thus, polar form of 69 + 420i = 425.6[cos(80.67°) + isin(80.67°)].
问题 5:将 2 + 2i 转换为极坐标形式。
解决方案:
Given, z = 2 + 2i.
Comparing this with z = x + iy, Therefore, x = 2 and y = 2
Modulus = r = = 2.82
Argument = tan-1{2/2} = tan-1{tan(π/4} = π/4
Thus, polar form of 2 + 2i =