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MHT CET202015 Oct 2020Morning ShiftMathematicsThree Dimensional GeometryActual

If the direction cosines of a line are 1 c , 1 c , 1 c then

Options

  1. A2 < c < 3
  2. Bc = 3
  3. Cc = 3
  4. Dc = 1 3

Correct answer

C. c = 3

Step-by-step solution

Given =m=n= 1 c We know that ²+ m ²+ n ²=1 3 c ² =1 c ²=3 c = 3

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