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# bit confused? Watch

1. In two dimensions, find vector equation for the x axis? I don't get how to do it without any positions given?? am i missing something obvious HELP..
2. y = 0
y = 0
r = (0,0,0)+t(1,0,0)

edit wrong person...
4. (Original post by calster102)
In two dimensions, find vector equation for the x axis? I don't get how to do it without any positions given?? am i missing something obvious HELP..
look at post 3
5. (Original post by TeeEm)
look at post 3
Oh i see thanks
6. (Original post by calster102)
Oh i see thanks
no worries
7. (Original post by TeeEm)
no worries
I just have one question where did the 1 come from in the direction column vector why is it 1 and not 2 etc?
8. (Original post by calster102)
I just have one question where did the 1 come from in the direction column vector why is it 1 and not 2 etc?
The t before the direction vector can be any value, so it really doesn't matter.
9. (Original post by Phichi)
The t before the direction vector can be any value, so it really doesn't matter.
Ah i see so they just take the smallest number to use instead
10. (Original post by calster102)
Ah i see so they just take the smallest number to use instead
a small sensible number indeed

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