Тригонометричні рівняння і нерівності

±π/12+πk,k∈Z

±π/3+πk/2,k∈Z

(-1)^(k+1) π/12+πk/2,k∈Z

(-1)^k π/12+πk/2,k∈Z

π+πk,k∈Z

π+2πk,k∈Z

π/9+2πk/9,k∈Z

π/9+2πk,k∈Z

π/3+πk,k∈Z

π/12+πk,k∈Z

π/24+πk/4,k∈Z

π/12+πk/4,k∈Z

π/2+πk,k∈Z

π/6+πk/3,k∈Z

3π/2+3πk,k∈Z

3π/2+6πk,k∈Z

±arccos 1/5+2πk,k∈Z

(-1)^k arcsin 1/5+πk,k∈Z

arctg 1/5+πk,k∈Z

arcctg 1/5+πk,k∈Z

один

два

жодного

безліч

[π/3+2πn;5π/3+2πn],n∈Z

(π/3+2πn;5π/3+2πn),n∈Z

(π/3;5π/3)

(-π/3+2πn;π/3+2πn),n∈Z

(-π/4+πn/2;πn/2],n∈Z

(π/2+πn;πn],n∈Z

[-π/2+πn;πn],n∈Z

[-π/4+πn;πn],n∈Z

[π/6+2πn;5π/6+2πn],n∈Z

(π/6+2πn;5π/6+2πn),n∈Z

(π/24;5π/24),

(π/24+πn/2;5π/24+πn/2),n∈Z

один

два

безліч

жодного