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2 years ago

7

En ampliar o reducir una fotografía, obtenemos copias de la fotografía original, pero de medida diferente. Si la anchura del ori

ginal de una fotografía mide 15 cm, cuál será la anchura de una copia reducida un 60%?

1 answer:

antoniya [11.8K]2 years ago

7 0

Answer:

La anchura será de:

6 cm

Step-by-step explanation:

El formato original corresponde al 100%

Si se reduce un 60% quiere decir que:

100 - 60 = 40%

la reducción queda al 40%

entonces, por regla de tres:

15cm es al 100%

A cm es al 40%

A = 15*40/100

A = 6cm

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Step-by-step explanation:

<u>Funciones Trigonométricas</u>

La identidad principal en trigonometría es:

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Si sabemos que A es un ángulo agudo (que mide menos de 90°), su seno y coseno son positivos.

Dado que Sen A = 4/5, calculamos el coseno:

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Sustituyendo:

$\displaystyle cos^2A=1-\left(\frac{4}{5}\right)^2$

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