Sin225= tg240= ctg135=

Question

Sin225=
tg240=
ctg135=

Answer 1

Sin(225) = sin(180 + 45) = -sin(45) = - √2/2
tg(240) = tg(180 + 60) = tg(60) = √3
ctg(135) = ctg(180 - 45) = - ctg(45) = - 1