# Is this mathematically correct?

• 06-23-2002
incognito
Is this mathematically correct?
Check out image.
• 06-23-2002
Driveway
If variabkes a and b are 1, then yes
• 06-23-2002
incognito
Basically I want to know how I would solve this.........(some 3d vector magnitude stuff).........
• 06-23-2002
incognito
Is this code the same as.........

|A|=sqrt(Ax^2+Ay^2+Az^2) ?

/EDIT/
Could I have written it this way?
• 06-23-2002
SilentStrike
I don't know what you were trying to do with the first slide.. but yeah, the magnitude of a vector is the squareroot of the sum of the squares of the components of the vector.
• 06-23-2002
incognito
In the first one, I was just trying to make a point........So essentially just to make sure in the second image that I put is the same as this |A|=sqrt(Ax^2+Ay^2+Az^2)?

/EDIT/ I am just trying to see how to work with subscripts and their meanings.
• 07-20-2002
Unregistered
Yeah but you know what? If it was higher math we could argue about it.
• 07-20-2002
Akilla
Ask me if it's math :)
Well, Ax (A sub x) is in x direction..

in your program, as long as Ax (AX or Ax) represents
a magnitude in x direction, you can even name it
as Akillax ... it's just naming.

also, whenever you say Ax ^2 , it generally means (A sub x)^2
[A sub x whole square]
Squaring of x doesn't make sense as x (in this case) refers to a quantity along x axis.

Mod A i.e.
|A| = sqrt [(Qty along X)^2 + (Qty along y)^2 + (Qty along z)^2]

So you have to square the magnitude (i.e. A) along x, y and z.

in other words, You shouldn't square x, y and z but the different values of A along x, y and z axes.

example:

A = 7x+ 3y + 4z

|A|= squarerootof (7^2 + 3^2 + 4^2)

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