Question

помогите! алгебра 10 класс

Answer 1

a) tg5π/4 = tg(π + π/4) = tgπ/4 = 1
б)Сtg4π/3 = Ctg(π + π/3) = Ctgπ/3 = 1/√3
в) tg5π/6 =-1/√3
г) Ctg 7π/4 = Ctg(2π -π/4) = -Ctgπ/4 = -1