Instructions
Press "Start" to access the main menu.
Select the "Equipment" tab.
Press "X" on the equipment slot below the "Right Hand" icon. This icon is of a hand with a two on it. Select the bow from the list of weapons to equip it.
Press "X" on the equipment slot below the icon of a quiver of arrows. Select the arrows to equip them.
Press "Start" to exit the menu.
Press and hold "R2" to draw your bow.
Release "R2" to fire your bow.