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AP EAMCET2012MathematicsThree Dimensional Geometry

A straight line is equally inclined to all the three coordinate axes. Then, an angle made by the line with the y -axis is

Options

  1. A⁻¹ ( 1 3 )
  2. B⁻¹ ( 1 3 )
  3. C⁻¹ ( 2 3 )
  4. D4

Correct answer

B. ⁻¹ ( 1 3 )

Step-by-step solution

Since, a line is equally inclined to the coordinate axes. array ll & l-m=n & l^2+m^2+n^2=1 & 3 l^2=1 & l= 1 3 array Angle made by line with y -axis = ⁻¹ ( 1 3 )

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