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math: Add align for parametric and fix formula typo

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eggy 2021-05-31 17:55:39 -04:00
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@ -571,9 +571,11 @@ $$\vec r = \vec r_0 + s\vec u + t\vec v,s,t\in\mathbb R$$
This can be expanded to form the parametric form of the equation: This can be expanded to form the parametric form of the equation:
$$ $$
x=x_0+su_1+tv_1 \\ \begin{align*}
y=y_0+xu_2+tv_2 \\ x&=x_0+su_1+tv_1 \\
z=z_0+su_3+tv_3,s,t\in\mathbb R y&=y_0+su_2+tv_2 \\
z&=z_0+su_3+tv_3,s,t\in\mathbb R
\end{align*}
$$ $$
Where $A,B.C.D$ are all integers, the **scalar** or Cartesian equation of a plane in three dimensions can be expressed as follows: Where $A,B.C.D$ are all integers, the **scalar** or Cartesian equation of a plane in three dimensions can be expressed as follows: