Mathematics - 3D Coordinate Geometry Question with Solution | TestHub

Mathematics3D Coordinate GeometryCoordinates of a point in space, Direction cosines,Hard2 minPYQ_2022

MathematicsHardsingle choice

The direction cosines of the line, which is perpendicular to the lines with direction rations $- 1, 2, 2$ and $0, 2, 1$ , are respectively

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Answer:

Solution:

The d.r.s can be obtained by $\frac{a}{2 \times 1 - 2 \times 2} = \frac{b}{0 \times 2 - ( - 1 ) \times 1} = \frac{c}{( - 1 ) \times 2 - 0 \times 2} \Rightarrow< 2, - 1, 2 > \Rightarrow d.c’s are < \frac{2}{3}, \frac{- 1}{3}, \frac{2}{3} >$

Stream:MHT_CETSubject:MathematicsTopic:3D Coordinate GeometrySubtopic:Coordinates of a point in space, Direction cosines,

⏱ 2mℹ️ Source: PYQ_2022

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