Doubt from vector


Q24 'a' part

Second one also ( of q 24)

Are the answers correct?

Answer are not available today

Can u tell me from where I can find this concept. Or u can post Screenshots of that page particularly

Area=\frac{1}{2}×|\vec{b}|×|\vec{a}|×sin60°
=\frac{1}{2}×|\vec{b}×\vec{a}|