Respuesta :

take a good peek at  your Unit Circle, if you don't have one, this is a great time to get one, many you can find online, those two angles are pretty well known.


[tex]\bf sin\left( \frac{\pi }{3} \right)cos(\pi )\implies \cfrac{\sqrt{3}}{2}\cdot -1\implies -\cfrac{\sqrt{3}}{2}[/tex]

gmany

Look at the picture.

[tex]\sin\dfrac{\pi}{3}=\dfrac{\sqrt3}{2}\\\\\cos\pi=-1\\\\\sin\dfrac{\pi}{3}\cdot\cos\pi=\dfrac{\sqrt3}{2}\cdot(-1)=-\dfrac{\sqrt3}{2}[/tex]

[tex]Answer:\ \boxed{A)\ -\dfrac{\sqrt3}{2}}[/tex]

Ver imagen gmany

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