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lecture_23_slides
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| lecture_23_slides [2017/04/24 11:27] – [Distance between lines in $\mathbb{R}^3$ in general] rupert | lecture_23_slides [2017/04/24 11:30] (current) – [Example using $\def\dist{\text{dist}}\dist(B,L)=\frac{\|\vec{AB}\times\vv\|}{\|\vv\|}$] rupert | ||
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| - | ==== Example using $\def\dist{\text{dist}}\dist(B, | + | ==== Example using $\def\vv{\vec v}\def\dist{\text{dist}}\dist(B, |
| Find the distance from the point $B=(1,2,3)$ to the line \[L:\c xyz=\c10{-1}+t\c41{-5}, | Find the distance from the point $B=(1,2,3)$ to the line \[L:\c xyz=\c10{-1}+t\c41{-5}, | ||
| Line 82: | Line 82: | ||
| * Instead: observe that $\dist(L_1, | * Instead: observe that $\dist(L_1, | ||
| * So we can use one of of the point-to-line distance formulae we saw earlier. | * So we can use one of of the point-to-line distance formulae we saw earlier. | ||
| + | |||
| + | ==== End of the course ==== | ||
| + | |||
| + | * Next time: some examples from the most recent exam paper | ||
| + | * Have a look at these before Thursday' | ||
lecture_23_slides.1493033279.txt.gz · Last modified: by rupert