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Sumario razones trigonopmétricas

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resolución de triángulo rectángulo, paso a paso

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Colegio secundario “Mons. Audino y Olmos” Matemática 5º Año




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, Colegio secundario “Mons. Audino y Olmos” Matemática 5º Año

Recordemos algunos conceptos importantes:
Medida de los ángulos:
La amplitud de un ángulo es la medida de la abertura de sus lados, puede expresarse con letras mayúsculas y un
arco encima o con letras griegas (𝐴̂ 𝑜 ∝)
Que un ángulo tenga una amplitud mayor o menor no depende de la longitud de sus lados sino su abertura.
La unidad de medida de la amplitud de los ángulos es el grado. Su símbolo es °.




Para medir ángulos con mayor exactitud, ademas de grados, se utilizan otras unidades de medida como el minuto y
el segundo. Sus simbolos son ´ y “. Estas unidades se realacionan de forma sexagesimal.




Sistema sexagesimal
*El grado sexagesimal se creó dividiendo una circunferencia en 360 partes iguales, el ángulo correspondiente a cada
una de sus partes es un ángulo de un grado sexagesimal (1°). Es importante saber que la necesidad de obtener un
ángulo más pequeño que un grado sexagesimal (1°) se crearon los minutos (’) y los segundos (”) y equivalen de la
siguiente forma: Un grado sexagesimal tiene 60 minutos (‘) y un minuto tiene 60 segundos (‘’).
Por ejemplo, el ángulo 45° 30’ 55’’ se lee “cuarenta y cinco grados, treinta minutos, cincuenta y cinco segundos”.




Sistema radial o circular
El Radián (rad) es la medida de un ángulo cuyo arco mide igual que el radio, para entender esto veamos la figura
siguiente:




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