UPSC NDA II 2024 Mathematics Paper
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Question Numbers: 67-68
Direction: Consider the following for the items that follow:
Let S be the line of intersection of two planes x + y + z = 1 and 2x + 3y - 4z = 8.
Direction: Consider the following for the items that follow:
Let S be the line of intersection of two planes x + y + z = 1 and 2x + 3y - 4z = 8.
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Question : 68 of 120
Marks:
+1,
-0
If 〈l, m, n〉 are direction cosines of S, then what is the value. of 43 (I2 - m2 - n2)?
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