© examsiri.com
Question : 121 of 150
Marks:
+1,
-0
Solution:
+ =
|−| ⇒
√A2+B2+2ABcosθ =
√A2+B2−2ABcosθ Squaring both the sides, we get
2+2 +
2 cos θ
or
4 cos θ = 0 or cos θ = 0 (since the scalar or dot product is zero) . Therefore angle between
to
is 90°
© examsiri.com
Go to Question: