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MHT CET202019 Oct 2020Evening ShiftMathematicsThree Dimensional GeometryActual

A line makes angles , , with the co-ordinate axes and + =90^ , then =

Options

  1. A60^
  2. B90^
  3. C45^
  4. D30^

Correct answer

B. 90^

Step-by-step solution

We know that ² + ² + ² =1 It is given that + =90^ =90^ - = (90^ - ) = ² = ² =1- ² ² + ² =1 Thus 1+ ² =1 ² =0 =90^

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