Evaluate
-\frac{3}{2}=-1.5
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4\left(-1\right)\sin(30)+\cos(60)
Use the property \sin(-x)=-\sin(x).
4\left(-\frac{1}{2}\right)+\cos(60)
Get the value of \sin(30) from trigonometric values table.
-2+\cos(60)
Multiply 4 and -\frac{1}{2} to get -2.
-2+\frac{1}{2}
Get the value of \cos(60) from trigonometric values table.
-\frac{3}{2}
Add -2 and \frac{1}{2} to get -\frac{3}{2}.
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