Найти по ч.о. sin t, cos t, tg t, ctg t, t= 7π/3
Sin 7π/3 = sin (2π + π/3) = sin π/3 = sqrt3/2 cos 7π/3 = cos (2π + π/3) = cos π/3 = 1/2 tg 7π/3 = tg (2•π + π/3) = tg π/3 = sqrt3 ctg 7π/3 = ctg (2•π + π/3) = ctg π/3 = sqrt3/3
Спасибо :)