" 2) Define unit vector."

What is a null vector? Define a unit vector.

Define the Vector

Define vectors.

(A) : hati+hatj is not a unit vector (R) : The addition of unit vectors never gives unit vector

If the sum of two unit vectors is also a unit vector. Then magnituce of their difference and angle between the two given unit vectors is

If the sum of two unit vectors is also a unit vector. Then magnituce of their difference and angle between the two given unit vectors is