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Small fix

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Antti H S Laaksonen 2017-02-27 22:21:49 +02:00
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chapter29.tex
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@ -231,7 +231,7 @@ The \key{cross product} $a \times b$ of vectors
$a=(x_1,y_1)$ and $b=(x_2,y_2)$ equals $x_1 y_2 - x_2 y_1$. $a=(x_1,y_1)$ and $b=(x_2,y_2)$ equals $x_1 y_2 - x_2 y_1$.
The cross product tells us whether $b$ The cross product tells us whether $b$
turns left (positive value), does not turn (zero) turns left (positive value), does not turn (zero)
or turns to right (negative value) or turns right (negative value)
when it is placed directly after $a$. when it is placed directly after $a$.
The following picture illustrates the above cases: The following picture illustrates the above cases: