MCQ
The value of $\cos \left(-660^{\circ}\right)$ is :
- A$\frac{\sqrt{3}}{2}$
- B$-\frac{1}{2}$
- ✓$\frac{1}{2}$
- D$\frac{1}{\sqrt{2}}$
✓
Answer
Correct option: C.
$\frac{1}{2}$
(C )
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