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Direction Cosines

If A = 4,1,5...

Question

If $A = (4, 1, 5)$ and $B = (3, 4, 5)$ The direction ratios of $¯ ¯¯¯¯¯¯ ¯ A B$ are

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Solution

$A (4, 1, 5)$ and $B (3, 4, 5)$
The direction ratios of $¯ ¯¯¯¯¯¯ ¯ A B$ is $(3 - 4, 1 - 4, 5 - 5) = (- 1, 3, 0)$

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