2. Example-2
1. Find A.B
`A=(2,3,1)`,`B=(0,5,6)`
Solution:
Here `vec A=(2,3,1),vec B=(0,5,6),vec C=(2,3,1)`
`vec A * vec B`
`=A_1*B_1+A_2*B_2+A_3*B_3`
`=2*0+3*5+1*6`
`=0+15+6`
`=21`
2. Find B.A
`A=(2,1,-1)`,`B=(1,0,-1)`
Solution:
Here `vec A=(2,1,-1),vec B=(1,0,-1),vec C=(2,1,-1)`
`vec B * vec A`
`=B_1*A_1+B_2*A_2+B_3*A_3`
`=1*2+0*1+(-1)*(-1)`
`=2+0+1`
`=3`
This material is intended as a summary. Use your textbook for detail explanation.
Any bug, improvement, feedback then
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