Tabla de f´ormulas trigonom´etricas.
tan(A) = sen(A)
cos(A)cotg(A) = cos(A)
sen(A)=1
tan(A)
sec(A) = 1
cos(A)cosec(A) = 1
sen(A)
cos2(A) + sen2(A) = 1 1 + tan2(A) = sec2(A) 1 + cot2(A) = cosc2(A)
F´ormulas del ´angulo suma.
cos(A+B) = cos(A)·cos(B)−sen(A)·sen(B)
sen(A+B) = sen(A)·cos(B) + cos(A)·sen(B)
cos(A−B) = cos(A)·cos(B) + sen(A)·sen(B)
sen(A−B) = sen(A)·cos(B)−cos(A)·sen(B)
tan(A+B) = tan(A) + tan(B)
1−tan(A) tan(B)
tan(A−B) = tan(A)−tan(B)
1 + tan(A) tan(B)
F´ormulas del ´angulo doble
cos(2A) = cos2(A)−sen2(A)
sen(2A) = 2 ·sen(A)·cos(A)
cos2(A) = 1 + cos(2 ·A)
2
sen2(A) = 1−cos(2 ·A)
2
tan(2A) = 2 tan(A)
1−tan2(A)
F´ormulas de la tangente del ´angulo mitad
Sea t= tan 1
2A. Entonces:
sen(A) = 2t
1 + t2,cos(A) = 1−t2
1 + t2,tan(A) = 2t
1−t2
Sumas y diferencias de senos y cosenos
sen(C) + sen(D) = 2 ·sen C+D
2cos C−D
2,
