Mark (√) against the correct answer in the following:
If 
and 
are mutually perpendicular unit vectors then 
Given vectors 
and 
Also given 
As they are perpendicular,
=0
⇒ (
).(
⇒ (3 
1) + (1
) + (-2 
-3) =0
⇒ 3+
+6=0
⇒ 
1
Mark (√) against the correct answer in the following:
If and are mutually perpendicular unit vectors then
Given vectors and
Also given
As they are perpendicular,=0
⇒ ().(
⇒ (3 1) + (1) + (-2 -3) =0
⇒ 3++6=0
⇒