- #1
ME_student
- 108
- 5
Homework Statement
Here is the problem: ([itex]\sqrt{}6[/itex](cos(3pie/16)+i sin(3pie/16)))^4
Homework Equations
After 360*=2pier Do you add 2pier to the next degree which would be 30*=pie/6?
What do you mean by this? By "2pier" do you mean ##2\pi## radians or ##2\pi r##, the circumference of a circle? What is "the next degree"? After 360 degrees, the next degree is 361 degrees, no?ME_student said:After 360*=2pier Do you add 2pier to the next degree which would be 30*=pie/6?
vela said:What do you mean by this? By "2pier" do you mean ##2\pi## radians or ##2\pi r##, the circumference of a circle? What is "the next degree"? After 360 degrees, the next degree is 361 degrees, no?
2milehi said:So much easier when using Euler's formula. I can do it in my head rather quickly.
To convert a complex number from the form a+bi to polar form, you can use the following formula: r = √(a² + b²) and θ = tan⁻¹(b/a). The polar form of the complex number would be r(cosθ + isinθ).
Converting a complex number from rectangular form to polar form can be helpful in understanding the geometric representation of the number. The magnitude (r) represents the distance of the number from the origin, and the angle (θ) represents the direction or phase of the number.
Sure, for example, to convert 3+4i to polar form, we first find the magnitude using the formula r = √(3² + 4²) = √25 = 5. Then, we find the angle using the formula θ = tan⁻¹(4/3) ≈ 53.13°. Therefore, the polar form of 3+4i would be 5(cos53.13° + isin53.13°).
The complex conjugate of a complex number a+bi is a-bi. It is related to the rectangular form of the number as it reflects the number across the real axis. In other words, the real part remains the same, but the imaginary part changes its sign.
Yes, there is a shortcut called the polar form conversion shortcut. For a complex number a+bi, the polar form can be found by using the formula r = √(a² + b²) and θ = arctan(b/a), where arctan is the inverse tangent function. This shortcut can save time and avoid potential calculation errors.