Answer:
\(-(\frac{1}{2})\)
Step-by-step explanation:
The given expression is:
\(cos120^{\circ}\)
This expression can be rewritten as:
=\(cos(180-60)^{\circ}\)
=\(-cos60^{\circ}\)
=\(-(\frac{1}{2})\) (Because the value of \(cos60^{\circ}\) is \(\frac{1}{2}\))
which is the required simplified expression.
