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Mathematics

Direction of vectors

Chapter: Vector Algebra

Question 1 of 2 NDA MCQ

If the direction cosines < l, m, n > of a line are connected by relation l + 2m + n = 0, 2l – 2m + 3n = 0, then what is the value of l2 + m2 – n2?

Detailed Explanation

Question 2 of 2 NDA MCQ

If (l, m, n) are direction cosines of S, then what is the value of 43(l2 – m2 – n2)?

Detailed Explanation

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