Determine the equation of line g which passes through point A(1,-1,3) and is parallel to the x-axis,

Letting be the direction vector of line g,

(Why??)

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- Jul 27th 2009, 07:38 PMchengbinParametric equations
Determine the equation of line g which passes through point A(1,-1,3) and is parallel to the x-axis,

Letting be the direction vector of line g,

(Why??) - Jul 27th 2009, 07:49 PMsongoku
Because the line g is parallel to the x-axis, the direction will be (1,0,0).

The value of the direction is on the x-direction only, leaving the others zero - Jul 28th 2009, 05:15 AMdhiab
Hello Thank you This the solution :

The line is definite by :http://mathramz.com/xyz/latexrender/...edc6222471.png

But :

http://mathramz.com/xyz/latexrender/...ac5d367b00.png

THE**Parametric equations IS :**

http://mathramz.com/xyz/latexrender/...5ba8877fc3.png - Jul 28th 2009, 05:42 AMchengbin
- Jul 29th 2009, 12:46 AMsongoku
You can choose x = 2, 3, 1/3, etc..

let x = 2

let x = 3

For the direction of a vector, usually the simplest form is used which is (1,0,0)