cos( 5π/6)
You asked:
Evaluate the expression: \(\cos\left( \frac{5 \cdot \pi}{6} \right)\)
MathBot Answer:
\[\cos\left( \frac{5 \cdot \pi}{6} \right) = - \frac{\sqrt{3}}{2} \approx -0.86602540378443864676372317075294\]
\[\begin{aligned}\cos\left( \frac{5 \cdot \pi}{6} \right)& = \cos{\left(5 \cdot \frac{\pi}{6} \right)}\\& = \cos{\left(\frac{5}{6} \cdot \pi \right)}\\& = - \frac{1}{2} \cdot \sqrt{3}\end{aligned}\]