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Please Solve R.D.Sharma class 12 Chapter 22 Algbra of Vectors Exercise 22.9 Question 2 Maths Textbook Solution.
Answers (1)
Answer: 1, 1, 1 cannot be the direction cosines of a straight line.
Given: Prove that 1, 1, 1 cannot be the direction cosines of a straight line.
Hint: Check by using
Explanation: We know if l, m, n are the direction cosines of any line then
But here
So 1, 1, 1 can’t be the direction cosines for any line.
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