Chapter 7 - Applications of Trigonometry and Vectors - Section 7.4 Vectors, Operations, and the Dot Product - 7.4 Exercises - Page 332: 2

$\textbf{p}$ and $\textbf{q}$ $\textbf{r}$ and $\textbf{s}$ $\textbf{n}$ and $\textbf{s}$

Two vectors are opposites when they have the same magnitude but different directions. According to this definition, the pair of vectors that appear to be opposite are $\textbf{p}$ and $\textbf{q}$,$\textbf{r}$ and $\textbf{s}$ and $\textbf{n}$ and $\textbf{s}$.