Angulos del IIc
Sen α = Sen (180° - α)
Cos α = -Cos (180° - α)
Tg α = -Tg (180° - α)
Angulos del IIIc
Sen α = -Sen (α-180°)
Cos α = -Cos (α-180°)
Tg α = Tg (α-180°)
Angulos del IVc
Sen α = -Sen (360° - α)
Cos α = Cos (360° - α)
Tg α = -Tg (360° - α)
Angulos complementarios
Sen (90-α) = Cos α Csc (90-α) = Sec α
Cos (90-α) = Sen α Sec (90-α) = Csc α
tg (90-α) = Ctg α Ctg (90-α) = tg α
Angulos suplementarios
Sen (180-α) = Sen α Csc (180-α) = Csc α
Cos (180-α) = -Cos α Sec (180-α) = -Sen α
tg (180-α) = -tg α Ctg (180-α) = -Ctg α
Angulos que difieren en 90°
Sen (90+α) = Cos α Csc (90+α) = Sec α
Cos (90+α) = -Sen α Sec (90+α) = -Csc α
tg (90+α) = -Ctg α Ctg (90+α) = -tg α
Angulos que difieren en 180°
Sen (180+α) = -Sen α Csc (180+α) = -Csc α
Cos (180+α) = -Cosα Sec (180+α) = -Sec α
tg (180+α) = tg α Ctg (180+α) = Ctg α
Angulos que difieren en 270°
Sen (270+α) = -Cos α Csc (270+α) = -Sec α
Cos (270+α) = Sen α Sec (270+α) = Csc α
tg (270+α) = -tg α Ctg (270+α) = -Ctg α
Razones trigonométricas del ángulo
doble
Sen 2α = 2Sen α * Cos α
Cos 2α = Cos2 α – Sen2α
tg 2α =
Razones trigonométricas en función
del ángulo mitad.
Sen α = 2Sen * Cos
Cos α = Cos2 – Sen2
tg α =
Factorización
Razones trigonométricas de la suma y
diferencia de ángulos
