Respuesta :
Answer:
Reference angle will be 60°
sin(240°) [tex]\frac{-\sqrt{3}}{2}[/tex]
cos(240) = [tex]\frac{1}{2}[/tex]
Step-by-step explanation:
We have given angle 240°
We ave t find the reference angle of 240°
As we know that 240° will lie in third quadrant
And for third quadrant reference angle is given by
Reference angle = angle - 180° =240°-180 = 60°
Now we have to find the value of sin(240°)
[tex]sin(240^{\circ})=sin(180+60)=-sin60^{\circ}=\frac{-\sqrt{3}}{2}[/tex]
Now [tex]cos(240^{\circ})=cos(180+60)=-cos60^{\circ}=\frac{-{1}}{2}[/tex]
