cos(2 $\pi$ /3)

asked by guest
on Oct 22, 2024 at 8:06 am



You asked:

Evaluate the expression: \(\cos\left( \frac{2 \cdot \pi}{3} \right)\)

MathBot Answer:

\[\cos\left( \frac{2 \cdot \pi}{3} \right) = - \frac{1}{2} = -0.5\]

\[\begin{aligned}\cos\left( \frac{2 \cdot \pi}{3} \right)& = \cos{\left(2 \cdot \frac{\pi}{3} \right)}\\& = \cos{\left(\frac{2}{3} \cdot \pi \right)}\\& = - \frac{1}{2}\end{aligned}\]

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