Chapter 13, Trigonometric Ratios and Functions - 13.2 Define General Angles and Use Radian Measure - 13.2 Exercises - Skill Practice - Page 863: 41

$\dfrac{\sqrt 3}{3}$

1. Set the calculator in radian mode. 2. Need to click TAN for $ \tan \dfrac{\pi}{6}$. 3. Then click the argument $\dfrac{\pi}{6}$. 4. Now click the ENTER Button. Thus, we get the answer $ \tan \dfrac{\pi}{6}=\dfrac{\sqrt 3}{3}$