cos(x)=1/2

Frequently Asked Questions

• $$\text{Giải quyeˆˊt cho }x$$ \(\cos(x)=1/2\)

  

  $$x=\{\begin{array}{l}\frac{\pi }{3}+2k\pi \\ \frac{5\pi }{3}+2k\pi \end{array},k\in \mathbb{Z}$$