## Geometry: Common Core (15th Edition)

csc $B = \frac{15}{9}$
If the cosecant ratio is the inverse of the sine ratio, then we just reverse the sides in the sine ratio to get the cosecant ratio. If sin $B$ = $\frac{opposite}{hypotenuse}$, then: csc $B$ = $\frac{hypotenuse}{opposite}$. . Let's look at angle $B$. The hypotenuse has a length of $15$, and the side opposite to $B$ has a length of $9$. csc $B = \frac{15}{9}$