AAI ATC Junior Executive 27 Jul 2022 Shift 3 Paper

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Question : 85 of 120

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If a line makes an angle of 60°, 135°, 120° with the positive x, y, z-axis, respectively, then find the direction cosines.

$l = \;{1}/{2},m = −\;{1}/{{√{2}}},n = −\;{1}/{2}$
$l = −\;{1}/{2},m = \;{1}/{{√{2}}},n = −\;{1}/{2}$
$l = −\;{1}/{2},m = −\;{1}/{{√{2}}},n = −\;{1}/{2}$
$l = \;{1}/{2},m = \;{1}/{{√{2}}},n = −\;{1}/{2}$

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