So, in which quadrant is ? And don't worry about embarrassing yourself, there is no shame in asking questions, the only shame is in not asking when you don't know.
Which range of values does 186° match? Is it in between 0° and 90°, or in between 90° and 180°, or in between 180° and 270°, or in between 270° and 360°?
Yes, since 180 < 186 < 270, we know 186° is a quadrant III angle. As such, what can we expect the sign of sin(186°) to be? Will it be negative or positive?