Teaching AWES Army Public School TGT Mock Test 2024 Mathematics Three Dimensional Geometry Direction ratios and Direction cosines
If a line makes a angles α, β and γ with the coordinate axes, then
1
sin2α + sin2β = 0
2
sin2 α + sin2 β + sin2 γ = 0
3
sin2 α + sin2 β + sin2 γ = 2
4
sin2 α + sin2 β + sin2 γ = 1