Помогитеееееееее!!!!!! Вычислить!!!)) Sin (-11П/3) cos 13П/4 tg(-5П/6) ctg7П/6
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lidochka085
Sin (-11П/3) cos 13П/4 tg(-5П/6) ctg7П/6=Sin(3π+2π/3) cos (3π+π/4) tg(π-π/6)ctg(π+π/6)=-sin2π/3 *(-cosπ/4)(-tgπ/6)ctg π/6=√3/2* √2/2*(-1)=-√6/4
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