The line parallel to x-axis and containing the point (3,4,5)......Any suggestions ???
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Originally Posted by Altair The line parallel to x-axis and containing the point (3,4,5)......Any suggestions ??? The x-axis is parallel to the vector (1,0,0). That means you know already the direction of the line and one point located on the line. Now use point-direction-form of the straight line: $\displaystyle \vec r = (3,4,5) + t\cdot (1,0,0)$
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