JEE Main & Advanced
Mathematics
Three Dimensional Geometry
Question Bank
System of Co-ordinates, Direction cosines and direction ratios, Projection
question_answer
If a line makes \[\alpha ,\beta ,\gamma \] with the positive direction of \[x,\ y\] and z-axis respectively. Then, \[{{\cos }^{2}}\alpha +{{\cos }^{2}}\beta +{{\cos }^{2}}\gamma \] is [Orissa JEE 2002]