- Books Name
- SonikaAnandAcademy Mathmatics Book
- Publication
- SonikaAnandAcademy
- Course
- CBSE Class 12
- Subject
- Mathmatics
Three dimensional Geometry
i ,j and k 3 unit vectors in direction of x axis y axis and z axis
Direction cosine give the angle with which align makes an angle with the axis formula for the direction cosine is
l = a cos ¢
m = b cos ¢
n = c cos ¢
Where a b and c are the direction ratios