If →A=2ˆi+3ˆj+4ˆk and →B=4ˆi+3ˆj+2ˆk, find →A×→B.
→A=2ˆi+3ˆj+4ˆk,→B=4ˆi+3ˆj+2ˆk
→A×→B =∣∣ ∣ ∣∣ˆiˆjˆk234432∣∣ ∣ ∣∣
= ˆi(6−12)−ˆj(4−16)+ˆk(6−12)
=-6ˆi+12ˆj−6ˆk
If →A=2^i−3^j and →B=−4^i+2^j, then |→A.→B|= ___