Plücker coordinates: Difference between revisions
No edit summary |
No edit summary |
||
| Line 103: | Line 103: | ||
$$ | $$ | ||
\frac{a \cdot b}{\left\| a \right\| \left\| b \right\| } = \cos (\theta) | \frac{a \cdot b}{\left\| a \right\| \left\| b \right\| } = \cos (\theta) \, . | ||
$$ | $$ | ||
| Line 110: | Line 110: | ||
$$ | $$ | ||
d(P, j) = \frac{X \wedge y}{\left\| X \right\| \left\| y \right\| } = \sin (\theta) | d(P, j) = \frac{ \left\| X \wedge y \right\| }{\left\| X \right\| \left\| y \right\| } = \sin (\theta) \, . | ||
$$ | $$ | ||