Question

If a vector making angles α ,β and γ with X-axis,Y-axis and Z-axis respectively, then Sin²α+ Sin²β +Sin²γ=​

Answer 1

cos

2

α+cos

2

β+cos

2

γ=1

1−sin

2

α+1−sin

2

β+1−sin

2

γ=1

∴sin

2

α+sin

2

β+sin

2

γ=2

Ans:C