Find the direction ratio of the line joining
points A (7,-4,7) and B(1, -6, 10).
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Answer:1, -4/7, 1
Explanation:
Direction cosine simply means the slant of any line relative to the origin considered.
Thus, to some origin K(0,0)
the line AB makes a slant
cosФ= a/mod(AB)
mod(AB)=\sqrt{6^{2} +2^{2} +3^{2}
=7
Thus cos angles are
1
-4/7
1
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