Question

обчислити значеня виразів

Answer 1

$tgfrac{20pi }{3}=tg(7pi -frac{pi }{3})=-tgfrac{pi }{3}=-sqrt3\\tgfrac{28pi}{3}=tg(9pi +frac{pi}{3})=tgfrac{pi}{3}=sqrt3\\tg(-frac{31pi }{6})=tg(-5pi -frac{pi}{6})=tg(-frac{pi}{6})=-tgfrac{pi}{6}=-frac{sqrt3}{3}\\tgfrac{16pi}{3}=tg(5pi +frac{pi}{3})=tgfrac{pi}{3}=sqrt3$