10К-3 Тригонометрические уравнения

A) sinx = √3/2; x = $(-1)^{n} π/3 +πn, [tex] б) /cosx = tgx - √3 =0; tgx = √3; x =arctg√3 +πn, x = π/3 +πn, n∈Z. г)cosx[tex] \neq 0; x \neq \pi /2+ \pi n,n$ ∈Z; sinx (sin2x + 1) = 0;
sinx = 0; x = πn, sin2x =- 1; sinx = -1/2; x = $(-1)^{n+1} \pi /6 + \pi n, nn∈Z.$
2) 2 cosx/2 меньше 1; cosx/2 = 1/2; x/2 =π/6 +2πn, n∈Z; x =+- π/3 +πn,n∈z;