Teaching EMRS PGT Mock Test 2023 Mathematics Three Dimensional Geometry Direction ratios and Direction cosines
The line with direction ratios 1, 0, -1 is inclined with z - axis at an angle
1
\(\frac{\pi }{4}\)
2
\(\frac{\pi }{2}\)
3
\(\frac{{3\pi }}{4}\)
4
\(\frac{{3\pi }}{2}\)