Алгебра 10 класс!!! 1) cost = 1/2 2) Sint= - корень 3/2 3) tgt = -1
1) cos t = 1/2, t = +- π/3 +2πn, n ∈ Z 2) sin t = -√3/2, t = (-1)^(n + 1) · π/3 + πk, k∈ Z 3) tg t = -1, t = -π/4 +πm, m∈ Z