AAI ATC Junior Executive 21 Feb 2023 Shift 1 Paper

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Question : 89 of 120

Marks: +1, -0

If the direction ratios of two lines are (1, 2, 3) and (-2, 3, -4), Then the angle between the lines is:

$\cos ^{−1}⁡ (\;{8}/{{√{406}}})$
$\cos ^{−1}⁡ (−\;{8}/{{√{406}}})$
$\cos ^{−1}⁡ (−\;{6}/{{√{406}}})$
$\cos ^{−1}⁡ (\;{6}/{{√{406}}})$

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