Let \(\vec a\) and \(\vec b\) be two vectors, which of the following vectors are not perpendicular to each other?

\(\vec a - \vec b\) and \(\vec a \times \vec b\)

\(\left(\vec a \times \vec b\right)\) and \(\vec a\)

\(\left(\vec a + \vec b\right)\) and \(\left(\vec a \times \vec b\right)\)

\(\vec a + \vec b\) and \(\vec a - \vec b\)

Let \(\vec a\) and \(\vec b\) be two vectors, which of the followi

1.	Let \(\vec a\) and \(\vec b\) be two vectors, which of the following vectors are not perpendicular to each other?
A.	\(\left(\vec a \times \vec b\right)\) and \(\vec a\)
B.	\(\left(\vec a + \vec b\right)\) and \(\left(\vec a \times \vec b\right)\)
C.	\(\vec a + \vec b\) and \(\vec a - \vec b\)
D.	\(\vec a - \vec b\) and \(\vec a \times \vec b\)
Answer» D. \(\vec a - \vec b\) and \(\vec a \times \vec b\)