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-\frac{1}{2}=\sin(-30)
Get the value of \sin(30) from trigonometric values table.
-\frac{1}{2}=-\sin(30)
Use the property \sin(-x)=-\sin(x).
-\frac{1}{2}=-\frac{1}{2}
Get the value of \sin(30) from trigonometric values table.
\text{true}
Compare -\frac{1}{2} and -\frac{1}{2}.
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