Q) If vectors 𝐚 ⃗, 𝐛 ⃗ 𝐚𝐧𝐝 𝟐𝐚 ⃗+𝟑𝐛 ⃗ are unit vectors, then find the angle between 𝐚 ⃗

Q) Find a vector of magnitude 21 units in the direction opposite to that of (AB) ⃗ where A and B

Q) Unit vector along (𝐏𝐐) ⃗ where coordinates of P and Q are (2, 1, -1) and (4, 4, -7) is