If 
and 
are unit vectors inclined at an angle 
then prove that
= 1+1-2×1×1×cosθ
= 2 - 2cosθ
= 2(1 - cosθ)
Dividing above by result (i) we will get,
Proved
8
If and are unit vectors inclined at an angle then prove that
= 1+1-2×1×1×cosθ
= 2 - 2cosθ
= 2(1 - cosθ)
Dividing above by result (i) we will get,
Proved