If l, m, n are the direction cosines of a line, then prove that l2 m2 n2 = 1. Hence find the direction angle of the line with the X axis which makes direction angles of 135° and 45° with Y and Z axes respectively. - Mathematics and Statistics | Shaalaa.com
If l, m, n are the direction cosines of a line, then prove that l2 m2 n2 = 1…
Sep 16, 2024
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