Question

Решите пож первый пример

Answer 1

№1
а) = -π/2+3*π/3+3/2*π/3= -π/2 +π +π/2 = π
б) = Сtg(2*5π/6) = Сtg5π/3 =-√3/3
№2
а)Ctgx = -8
x = arcCtg(-8) + πk, k∈Z
б) tgx = -√3/3
x = arctg(-√3/3) + πk , k∈Z
x = -π/6 + πk , k∈Z
№3
а) tgx >√3/3
π/2 < x < π/6
б) Сtgx < -1
3π/4 < x < π