state gov RPSC 2nd Grade Senior Teacher Mock Test Series 2025 Mathematics Three Dimensional Geometry Direction ratios and Direction cosines
What are the direction ratios of normal to the plane 2x - y + 2z + 1 = 0?
1
<2, 1, 2>
2
<1, - 1 / 2, 1>
3
<1, - 2, 1>
4
<1, 1, 2>
5
Question Not Attempted