`P(1,0,-1), Q(2,0,-3),R(-1,2,0)a n dS(,-2,-1),`then find the projectionlength of ` vec P Qon vec R Sdot`

`P(1,0,-1), Q(2,0,-3),R(-1,2,0)a n dS(,-2,-1),`then find the projectio

1.	`P(1,0,-1), Q(2,0,-3),R(-1,2,0)a n dS(,-2,-1),`then find the projectionlength of ` vec P Qon vec R Sdot`
Answer» `vec( PQ)=vec(OQ)-vec(OP)=hati -2hatk` `vec(RS)=vec(OS)-vec(OR)=4hati - 4hatj-hatk` Projection of `vec(PQ) on vec(RS)= (vec(QP)vec(RS))/(\|vec(RS)\|) = 6/sqrt33`

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`P(1,0,-1), Q(2,0,-3),R(-1,2,0)a n dS(,-2,-1),`then find the projectionlength of ` vec P Qon vec R Sdot`

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