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MHT CET202015 Oct 2020Evening ShiftMathematicsThree Dimensional GeometryActual

A line makes angles , , with the co-ordinate axes, then 2 + 2 + 2 is equal to

Options

  1. A2
  2. B-1
  3. C1
  4. D-2

Correct answer

B. -1

Step-by-step solution

2 + 2 + 2 =2 ² -1+2 ² -1+2 ² -1=2 ( ² + ² + ² )-3=2(1)-3=-1

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