Sin(-353град.) = Sin(-353 + 360) = Sin(7град.) = Sin(90 - 83) = cos(83град.) = cos(π/2 - π/3) = cos(π/6)
Cos(14π/3) = Cos(14π/3 - 4π) = Cos(2π/3) = Cos(120град.) = Cos(180 - 60) = -cos(60град.) = -cos(π/3) = -1/2
Ctg(-605град.) = Ctg(-605 + 360) = Ctg(-245град.) = -ctg(245град.) = -ctg(π - 245) = -ctg(π - π/9) = -ctg(8π/9)
Tg(12π/5) = Tg(12π/5 - 2π) = Tg(2π/5) = Tg(72град.) = Tg(90 - 18) = -tg(18град.) = -tg(π/10)
Sin(-353град.) = Sin(-353 + 360) = Sin(7град.) = Sin(90 - 83) = cos(83град.) = cos(π/2 - π/3) = cos(π/6)
Cos(14π/3) = Cos(14π/3 - 4π) = Cos(2π/3) = Cos(120град.) = Cos(180 - 60) = -cos(60град.) = -cos(π/3) = -1/2
Ctg(-605град.) = Ctg(-605 + 360) = Ctg(-245град.) = -ctg(245град.) = -ctg(π - 245) = -ctg(π - π/9) = -ctg(8π/9)
Tg(12π/5) = Tg(12π/5 - 2π) = Tg(2π/5) = Tg(72град.) = Tg(90 - 18) = -tg(18град.) = -tg(π/10)