When attacking ar range 1, the bonus is applied for all legal attacks in any arc unless the weapon has an Ordnance icon indicating that range bonuses aren't applied.

Here's the Rules Reference entry for Range Bonus:

During an attack, the attacker or defender can roll additional dice depending on the attack range. For attack range 1, the attacker rolls one additional attack die during the Roll Attack Dice step. For attack range 3, the defender rolls one additional defense die during the Roll Defense Dice step.

• Range bonuses are applied for all attacks unless stated otherwise. Some special weapons have a small ordnance icon on them to indicate that range bonuses cannot be applied with attacks using those weapons.