What is the exact value of sin 240º?

[Corkery]

Homework Statement

Find the exact value of each trig function:
Sin 240º

Homework Equations

The Attempt at a Solution

I am so lost here. I have no attempt. I am not asking you for the answer (i can't get answer without making an attempt which I don't have) i just need help. Please.

 

[Vagrant]

Try to express 240 as sum or difference of angles for which you know the value of sinӨ like 360, 30, 60 etc.

 

[Corkery]

so 240 is 60 degrees more than the 180 line of quadrant 2 so sin 60 = √3/2. is that right or am i totally off?

 

[f(x)]

so 240 is 60 degrees more than the 180 line of quadrant 2 so sin 60 = √3/2. is that right or am i totally off?

sin is -ve in 3rd and 4th quadrant