CPM Homework Help : PC Problem 2-131

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

Right triangle, A B C, angle A labeled, alpha, short leg, A B, labeled, small letter c, long leg, B C, labeled, small letter a, hypotenuse, A C, labeled, small letter b.

$\frac { 1 } { \operatorname { cos } ( \alpha ) } =$
Step (a):
$\cos(\alpha)=\frac{c}{b}$

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

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