1) tg(-765) = tg(-765 + 360) = tg(-405) = tg(-45) = -12) sin250 + sin110 = sin(360 - 110) + sin110 = sin250 + sin110 = -sin70 + sin110 = 2sin(20)cos(50)3) cos29cos119 + sin29sin119 = cos(119 - 29) = cos90 = 04) arctg(√3) - arctg(-1) = 60° - (-45°) = 60° + 45° = 105°
1) tg(-765) = tg(-765 + 360) = tg(-405) = tg(-45) = -1
2) sin250 + sin110 = sin(360 - 110) + sin110 = sin250 + sin110 = -sin70 + sin110 = 2sin(20)cos(50)
3) cos29cos119 + sin29sin119 = cos(119 - 29) = cos90 = 0
4) arctg(√3) - arctg(-1) = 60° - (-45°) = 60° + 45° = 105°