Question

Tg(-7pi/6)?
Ctg5pi/4?.
Sin t =3/5,pi/2

Answer 1

$tg (-frac{7pi }{6})=-tgfrac{x7pi }{6}=-tg(pi +frac{pi }{6} )=-tg frac{pi }{6} =- frac{sqrt3}{3} \\\ctg frac{5pi }{4}=ctg(pi +frac{pi }{4})=ctgfrac{pi }{4}=1\\\sint=frac{3}{5}; ; to ; ; ; t=(-1)^{n}arcsinfrac{3}{5} +pi n; ,; nin Z$