Class 12MathematicsThree Dimensional GeometrySystem of co-ordinates, Direction cosines and direction ratios, Projection
EasyIf a line makes angles $90^{\circ}, 135^{\circ},$ and $45^{\circ}$ with the $x, y,$ and $z$-axes respectively,find its direction cosines.
- A$0, -\frac{1}{\sqrt{2}}, \frac{1}{\sqrt{2}}$
- B$1, -\frac{1}{\sqrt{2}}, \frac{1}{\sqrt{2}}$
- C$0, \frac{1}{\sqrt{2}}, \frac{1}{\sqrt{2}}$
- D$1, \frac{1}{\sqrt{2}}, -\frac{1}{\sqrt{2}}$
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