Math Problem Statement

Найдите аргумент комплексного числа z = √3 + 3i. Ответ запишите в градусах.

Solution

To solve the problem, we need to find the argument of the complex number z=3+3iz = \sqrt{3} + 3i and express the answer in degrees.

Step-by-Step Solution:

  1. Recall the formula for the argument of a complex number: arg(z)=arctan(Im(z)Re(z)),\arg(z) = \arctan\left(\frac{\text{Im}(z)}{\text{Re}(z)}\right), where Im(z)\text{Im}(z) and Re(z)\text{Re}(z) are the imaginary and real parts of zz, respectively.

  2. Identify the real and imaginary parts: Re(z)=3,Im(z)=3.\text{Re}(z) = \sqrt{3}, \quad \text{Im}(z) = 3.

  3. Substitute into the formula: arg(z)=arctan(33).\arg(z) = \arctan\left(\frac{3}{\sqrt{3}}\right).

  4. Simplify the fraction: 33=3.\frac{3}{\sqrt{3}} = \sqrt{3}. So: arg(z)=arctan(3).\arg(z) = \arctan(\sqrt{3}).

  5. Find the angle: From trigonometry, arctan(3)=60\arctan(\sqrt{3}) = 60^\circ (in degrees).

Final Answer:

The argument of z=3+3iz = \sqrt{3} + 3i is: 60.\boxed{60^\circ}.


Would you like me to elaborate further or solve related problems?

Related Questions:

  1. What is the magnitude (modulus) of z=3+3iz = \sqrt{3} + 3i?
  2. How do you convert an argument in radians to degrees?
  3. Can we find the argument for a general complex number a+bia + bi?
  4. How does the quadrant of a complex number affect its argument?
  5. What is the polar form representation of z=3+3iz = \sqrt{3} + 3i?

Tip:

Always double-check which quadrant the complex number is in to determine the correct angle, especially when the argument is negative or over 180180^\circ.

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Math Problem Analysis

Mathematical Concepts

Complex Numbers
Trigonometry
Argument of a Complex Number

Formulas

arg(z) = arctan(Im(z)/Re(z))

Theorems

Basic Trigonometric Theorems

Suitable Grade Level

Grades 10-12