Algebra and Trigonometry 10th Edition

(a) $sin~(\frac{\pi}{18})=0.1736$ (b) $cot~(\frac{5\pi}{6})=-1.7321$
Select the radian (RAD) mode. (a) $sin~(\frac{\pi}{18})=0.1736$ (b) $cot~(\frac{5\pi}{6})=\frac{1}{tan~(\frac{5\pi}{6})}=-1.7321$