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PROYECTO 4
SEMANA 1
FUNCIONES TRIGONOMÉTRICAS
Ing. Jefferson Infante
Ing. Jefferson Infante
PROYECTO #4
SEMANA #1 FUNCIONES TRIGONOMÉTRICAS
OBJETIVO: DCCD: M.5.1.70. Definir las funciones seno y coseno a partir de las relaciones trigonométricas en el
círculo trigonométrico (unidad) e identificar sus respectivas gráficas a partir del análisis de sus características
particulares. M.5.1.71. Reconocer y graficar funciones periódicas determinando el período y amplitud de estas, su
dominio y recorrido, monotonía y paridad.
Concepto: La trigonometría es una rama de las matemáticas, que estudia las relaciones entre los ángulos y los lados
de los triángulos, en términos de funciones trigonométricas de los ángulos, como seno, coseno y tangente. Se la
suele utilizar especialmente cuando se necesita obtener medidas de precisión.
Función Seno:
Su abreviatura matemática es “sen” pero también puede ser “sin”. Consiste en el resultado dado por el cateto
contrario al ángulo recto y la hipotenusa. En ningún caso su valor puede ser mayor a 1. Técnicamente, el seno es
aquella función con valores que oscilan entre el – infinito y el + infinito. Si el valor del ángulo x radianes es mayor a
360°
Ing. Jefferson Infante
PROYECTO #4
SEMANA #1 FUNCIONES TRIGONOMÉTRICAS
Función Seno:
El seno de 𝛼 se define como el cociente del lado opuesto al ángulo 𝛼 y la
hipotenusa.
sin 𝛼 =
𝑐𝑎𝑡𝑒𝑡𝑜 𝑜𝑝𝑢𝑒𝑠𝑡𝑜
ℎ𝑖𝑝𝑜𝑡𝑒𝑛𝑢𝑠𝑎
=
𝑎
ℎ
Dominio = ℝ
Rango = −𝟏, 𝟏
Función Coseno:
Nunca puede superar el valor 1, al igual que el seno. Estamos frente a aquella de las funciones trigonométricas que
implica valores de x entendidos entre – infinito y + infinito. Es fundamental considerar que si x presenta un valor
mayor a 360°
Ing. Jefferson Infante
PROYECTO #4
SEMANA #1 FUNCIONES TRIGONOMÉTRICAS
Función coseno:
El coseno de 𝛼 se define como el cociente del lado adyacente al ángulo 𝛼 y la
hipotenusa.
cos 𝛼 =
𝑐𝑎𝑡𝑒𝑡𝑜 𝑎𝑑𝑦𝑎𝑐𝑒𝑛𝑡𝑒
ℎ𝑖𝑝𝑜𝑡𝑒𝑛𝑢𝑠𝑎
=
𝑏
ℎ
Dominio = ℝ
Rango = −𝟏, 𝟏
ACTIVIDAD A REALIZAR
Estudien la función real que se define en cada caso. Tracen la gráfica de la función:
 f(x) = cos (4x)
 f(x) = 2 sen (x – 1)

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FUNCIONES TRIONOMÉTRICAS

  • 1. PROYECTO 4 SEMANA 1 FUNCIONES TRIGONOMÉTRICAS Ing. Jefferson Infante
  • 2. Ing. Jefferson Infante PROYECTO #4 SEMANA #1 FUNCIONES TRIGONOMÉTRICAS OBJETIVO: DCCD: M.5.1.70. Definir las funciones seno y coseno a partir de las relaciones trigonométricas en el círculo trigonométrico (unidad) e identificar sus respectivas gráficas a partir del análisis de sus características particulares. M.5.1.71. Reconocer y graficar funciones periódicas determinando el período y amplitud de estas, su dominio y recorrido, monotonía y paridad. Concepto: La trigonometría es una rama de las matemáticas, que estudia las relaciones entre los ángulos y los lados de los triángulos, en términos de funciones trigonométricas de los ángulos, como seno, coseno y tangente. Se la suele utilizar especialmente cuando se necesita obtener medidas de precisión. Función Seno: Su abreviatura matemática es “sen” pero también puede ser “sin”. Consiste en el resultado dado por el cateto contrario al ángulo recto y la hipotenusa. En ningún caso su valor puede ser mayor a 1. Técnicamente, el seno es aquella función con valores que oscilan entre el – infinito y el + infinito. Si el valor del ángulo x radianes es mayor a 360°
  • 3. Ing. Jefferson Infante PROYECTO #4 SEMANA #1 FUNCIONES TRIGONOMÉTRICAS Función Seno: El seno de 𝛼 se define como el cociente del lado opuesto al ángulo 𝛼 y la hipotenusa. sin 𝛼 = 𝑐𝑎𝑡𝑒𝑡𝑜 𝑜𝑝𝑢𝑒𝑠𝑡𝑜 ℎ𝑖𝑝𝑜𝑡𝑒𝑛𝑢𝑠𝑎 = 𝑎 ℎ Dominio = ℝ Rango = −𝟏, 𝟏 Función Coseno: Nunca puede superar el valor 1, al igual que el seno. Estamos frente a aquella de las funciones trigonométricas que implica valores de x entendidos entre – infinito y + infinito. Es fundamental considerar que si x presenta un valor mayor a 360°
  • 4. Ing. Jefferson Infante PROYECTO #4 SEMANA #1 FUNCIONES TRIGONOMÉTRICAS Función coseno: El coseno de 𝛼 se define como el cociente del lado adyacente al ángulo 𝛼 y la hipotenusa. cos 𝛼 = 𝑐𝑎𝑡𝑒𝑡𝑜 𝑎𝑑𝑦𝑎𝑐𝑒𝑛𝑡𝑒 ℎ𝑖𝑝𝑜𝑡𝑒𝑛𝑢𝑠𝑎 = 𝑏 ℎ Dominio = ℝ Rango = −𝟏, 𝟏 ACTIVIDAD A REALIZAR Estudien la función real que se define en cada caso. Tracen la gráfica de la función:  f(x) = cos (4x)  f(x) = 2 sen (x – 1)