Pure Mathematics
Statistics

Unit 13.2 Worked Example 5

The planes [latex]{{\text{p}}_{1}}[/latex] and [latex]{{\text{p}}_{2}}[/latex] have equations [latex]\mathbf{r}\cdot \left( \begin{matrix}1  \\ -3  \\  2  \\\end{matrix} \right)=-5[/latex] and [latex]\mathbf{r}\cdot \left( \begin{matrix}  2  \\-1  \\  3  \\\end{matrix} \right)=1[/latex] respectively, and meet in the line [latex]{{l}_{4}}[/latex]. Find

(i)

the vector equation for [latex]{{l}_{4}}[/latex],

(ii)

Find the acute angle between [latex]{{\text{p}}_{1}}[/latex] and [latex]{{\text{p}}_{2}}[/latex].

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