Web Science/Part2: Emerging Web Properties/Modelling Similarity of Text/Cosine Similarity For Vectorspaces/quiz

1

Calculate the scalar product between ${\begin{pmatrix}2\\2\\5\end{pmatrix}}$ and ${\begin{pmatrix}2\\3\\0\end{pmatrix}}$.

	9
	10
	14
	54

2

What is true about the distance measures on vector spaces?

	they can have arbitrary large distances
	the cosine distance can be arbitrary large
	the euclidean distance is bound to a value of $2\pi$
	they can be transformed to a similarity measure