12th Class
Mathematics
Sample Paper
Maths Olympiad Model Paper-7
question_answer
If a line makes angles \[\alpha ,\] \[\beta ,\] \[\gamma ,\] \[\delta \] with the four diagonals of a cube, then the value of \[{{\cos }^{2}}\alpha +{{\cos }^{2}}\beta +{{\cos }^{2}}\gamma +{{\cos }^{2}}\delta =\]