### Home > PC > Chapter 2 > Lesson 2.3.5 > Problem2-131

2-131.

For $∆ABC$ below, state the ratio in terms of the sides.

1. $\frac { 1 } { \operatorname { cos } ( \alpha ) } =$

$\cos(\alpha)=\frac{c}{b}$

1. $\frac { 1 } { \operatorname { sin } ( \alpha ) } =$

1. $\frac { 1 } { \operatorname { tan } ( \alpha ) } =$