1.

If two vectors \(\vec{r}.\vec{n_1}=d_1\) and \(\vec{r}.\vec{n_2}=d_2\) are such that \(\vec{n_1}.\vec{n_2}\)=0, then which of the following is true?

A. The planes are perpendicular to each other
B. The planes are parallel to each other
C. Depends on the value of the vector
D. The planes are at an angle greater than 90°
Answer» B.


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