Chapter 1 - Trigonometric Functions - Section 1.3 Trigonometric Functions - 1.3 Exercises - Page 28: 22

$\sin\theta=\frac{y}{r}=\frac{0}{5}=0$ $\cos\theta=\frac{x}{r}=\frac{-5}{5}=-1$ $\tan\theta=\frac{y}{x}=\frac{0}{-5}=0$ $\csc\theta=\frac{r}{y}=\frac{5}{0}=undefined$ $\sec\theta=\frac{r}{x}=\frac{5}{-5}=-1$ $\cot\theta=\frac{x}{y}=\frac{-5}{0}=undefined$

$x=-5$ $y=0$ $r=\sqrt{(-5)^{2}+(0)^{2}}=\sqrt {25+0}= 5$