Teaching NVS TGT 2024 Test Series Mathematics Three Dimensional Geometry Direction ratios and Direction cosines
If a line makes an angle of 60°, 135°, 120° with the positive x, y, z-axis, respectively, then find the direction cosines.
1
\(\rm l=\frac{1}{2},m=-\frac{1}{\sqrt2}, n=-\frac{1}{2}\)
2
\(\rm l=-\frac{1}{2},m=\frac{1}{\sqrt2}, n=-\frac{1}{2}\)
3
\(\rm l=-\frac{1}{2},m=-\frac{1}{\sqrt2}, n=-\frac{1}{2}\)
4
\(\rm l=\frac{1}{2},m=\frac{1}{\sqrt2}, n=-\frac{1}{2}\)