Question

hen use the problems to the right to practice and learn the concepts.
lians
luate trig functions
8
multiple choice 1 point
give the exact value.
cos \frac{\pi}{3}
\frac{\sqrt{2}}{2}
\frac{\sqrt{3}}{2}
\frac{2\sqrt{3}}{3}
\frac{1}{2}

Explanation:

Step1: Recall the unit - circle value

We know that for an angle \(\theta\) in the unit - circle, \(\cos\theta=x\) coordinate of the point on the unit - circle corresponding to the angle \(\theta\).
For \(\theta = \frac{\pi}{3}\) (or \(60^{\circ}\)), the point on the unit - circle is \((\frac{1}{2},\frac{\sqrt{3}}{2})\).

Answer:

\(\frac{1}{2}\)