# Chapter 11 - Vectors and Vector-Valued Functions - 11.3 Dot Products - 11.3 Exercises: 15

$\textbf{u}\cdot\textbf{v} = 0$

#### Work Step by Step

$\textbf{u}\cdot\textbf{v} = u_1v_1 + u_2v_2$, where $\textbf{u} =$ and $\textbf{v} =$. $\textbf{u}\cdot\textbf{v} = (1)(1) + (1)(-1) = 1 - 1 = 0$

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