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14. Scalar triple product example ( Enter your problem )
  1. Example-1
  2. Example-2

2. Example-2





1. Find Scalar triple product
`A=(1,2,3)`, `B=(-1,0,6)`, `C=(3,4,5)`


Solution:
Here `vec A=(1,2,3),vec B=(-1,0,6),vec C=(3,4,5)`

`vec A*(vec B xx vec C)`

`=|[A_1,A_2,A_3],[B_1,B_2,B_3],[C_1,C_2,C_3]|`

 = 
 `1`  `2`  `3` 
 `-1`  `0`  `6` 
 `3`  `4`  `5` 


 =
 `1` `xx` 
 `0`  `6` 
 `4`  `5` 
 `-2` `xx` 
 `-1`  `6` 
 `3`  `5` 
 `+3` `xx` 
 `-1`  `0` 
 `3`  `4` 


`=1 xx (0 xx 5 - 6 xx 4) -2 xx (-1 xx 5 - 6 xx 3) +3 xx (-1 xx 4 - 0 xx 3)`

`=1 xx (0 -24) -2 xx (-5 -18) +3 xx (-4 +0)`

`=1 xx (-24) -2 xx (-23) +3 xx (-4)`

`= -24 +46 -12`

`=10`
2. Find Scalar triple product
`A=(5,6,1)`, `B=(0,2,3)`, `C=(3,-1,5)`


Solution:
Here `vec A=(5,6,1),vec B=(0,2,3),vec C=(3,-1,5)`

`vec A*(vec B xx vec C)`

`=|[A_1,A_2,A_3],[B_1,B_2,B_3],[C_1,C_2,C_3]|`

 = 
 `5`  `6`  `1` 
 `0`  `2`  `3` 
 `3`  `-1`  `5` 


 =
 `5` `xx` 
 `2`  `3` 
 `-1`  `5` 
 `-6` `xx` 
 `0`  `3` 
 `3`  `5` 
 `+1` `xx` 
 `0`  `2` 
 `3`  `-1` 


`=5 xx (2 xx 5 - 3 xx (-1)) -6 xx (0 xx 5 - 3 xx 3) +1 xx (0 xx (-1) - 2 xx 3)`

`=5 xx (10 +3) -6 xx (0 -9) +1 xx (0 -6)`

`=5 xx (13) -6 xx (-9) +1 xx (-6)`

`= 65 +54 -6`

`=113`




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