How do you evaluate $sin 120$ $Sin 120$ ?

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How do you evaluate $sin 120$ $Sin 120$ ?

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Answer 1 · 2016-06-26T02:54:44

We have that

$sin (120) = sin (2 \cdot 60) = 2 sin 60 \cdot cos 60 = 2 \cdot \frac{\sqrt{3}}{2} \cdot \frac{1}{2} = \frac{\sqrt{3}}{2}$ $sin(120)=sin(2*60)=2sin60*cos60=2*sqrt3/2*1/2=sqrt3/2$

Also

$sin (120) = sin (180 - 60) = sin 60 = \frac{\sqrt{3}}{2}$ $sin(120)=sin(180-60)=sin60=sqrt3/2$

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How do you evaluate $sin 120$ $Sin 120$ ?

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