The imagnary number i

[Sirricharic]

Im taking algebra 2 and I am having a hard time finding the purpose of imaginary numbers.  Do any of you guys need to use imaginary numbers? What are they used for other than another excuse to make people learn and fail.

[Myggen]

Google is your best friend !

[Jubin]

Like you know imaginary number i has two different kind of status [Don't know how to say it in English], one is algebraical and the other one is trigonometrical. If you have learned it a bit, then you know that trigonometrical coordinate axis consist of two part, the length and the angle. Also theory says that there is no length or angle in the beginning point.  So the trigonometrical aspect of the imaginary number is used by everybody who uses some kind of GPS device. The 0 point of the axes is the center of the earth and coordinates of the Earth is set by the imaginary number i trigonometrical values.

I hope that answers your question.

[Sirricharic]

I hope that answers your question.

No actually it doesnt im more confused now

[Jubin]

No actually it doesnt im more confused now

Well if your car has a GPS device, then it uses imaginary numbers to understand, where you are.

[Sirricharic]

lol car Gps units use xyz coordinates relative to the northpole

[Jubin]

lol car Gps units use xyz coordinates relative to the northpole

depends on the device, also land surveyors use imaginary number. Physicist too, to describe quantum mechanics( so soon I am gonna use imaginary numbers a lot)

[Call_me_Dad]

Imaginary numbers can be explained in 2 aspects: Algebraically and Geometrically

Algebraically:  Imaginary numbers are introduced to define the equation
x²+1=0
=>  x²=-1
=>  x=(-1)^1/2

which does not exist, because square of every number is positive.
so to define the under-root of -1, imaginary numbers are introduced
under-root of -1 is called i (greek letter 'iota')

If you have understood....
answer this:
What is the value of (3i)²

[Jubin]

he wants to understand, where you use imaginary numbers not what they are.

[Amon Ra]

Google is your best friend !

for pRON !!!

[Cross]

Respect for the people who understand this, but whats the use if it?

[cDa]

lol car Gps units use xyz coordinates relative to the northpole

actualy it uses 3 satelites nearest to u and calculates intersection of 3 signals to pinpoint you

wiki on gps

srsly offtopic...

but yeah i is used a lot by arhitect, mathematicians,even people who develop pc  hardware

[Jubin]

In electrical engineering, for example, the voltage produced by a battery is characterized by one real number (called amplitude), such as +12 volts or −12 volts. But the "AC" voltage in a home requires two parameters. One is an amplitude, such as 120 volts, and the other is an angle (called phase). The voltage is said to have two dimensions. A 2-dimensional quantity can be represented mathematically as either a vector or as a complex number (known in the engineering context as phasor). In the vector representation, the rectangular coordinates are typically referred to simply as X and Y. But in the complex number representation, the same components are referred to as real and imaginary. When the complex number is purely imaginary, such as a real part of 0 and an imaginary part of 120, it means the voltage has an amplitude of 120 volts and a phase of 90°, which is physically very real.

Well I guess I now know where I'm gonna use it

[Sirricharic]

In electrical engineering, for example, the voltage produced by a battery is characterized by one real number (called amplitude), such as +12 volts or −12 volts. But the "AC" voltage in a home requires two parameters. One is an amplitude, such as 120 volts, and the other is an angle (called phase). The voltage is said to have two dimensions. A 2-dimensional quantity can be represented mathematically as either a vector or as a complex number (known in the engineering context as phasor). In the vector representation, the rectangular coordinates are typically referred to simply as X and Y. But in the complex number representation, the same components are referred to as real and imaginary. When the complex number is purely imaginary, such as a real part of 0 and an imaginary part of 120, it means the voltage has an amplitude of 120 volts and a phase of 90°, which is physically very real.

What The Fuck Is That

[ToniaNVR]

70% of what kids study in schools won't be needed irl.