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3 years ago

Halp me plz now I need to go to school Now

Mathematics

1 answer:

ANEK [815]3 years ago

3 0

11.) All you've got to do is subtract thirty-eight(38) from eighty-one(81). This will result in 43.

81-38=43

12.) You've got to subtract eighty-seven(87) from ninety(90) which will give you the answer 3.

87-90=3

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3 years ago

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Tatiana [17]

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3 years ago

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En un triángulo rectángulo A es un ángulo agudo y Sen A = 4/5 ¿Cuál será el valor de Tan A?

Nonamiya [84]

Answer:

$\displaystyle \tan A=\frac{4}{3}$

Step-by-step explanation:

<u>Funciones Trigonométricas</u>

La identidad principal en trigonometría es:

$sen^2A+cos^2A=1$

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:

$cos^2A=1-sen^2A$

Sustituyendo:

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

$\displaystyle cos^2A=1-\frac{16}{25}$

$\displaystyle cos^2A=\frac{25-16}{25}$

$\displaystyle cos^2A=\frac{9}{25}$

Tomando raíz cuadrada:

$\displaystyle cos\ A=\sqrt{\frac{9}{25}}=\frac{3}{5}$

La tangente se define como:

$\displaystyle \tan A=\frac{sen\ A}{cos\ A}$

Substituyendo:

$\displaystyle \tan A=\frac{\frac{4}{5}}{\frac{3}{5}}$

$\displaystyle \tan A=\frac{4}{3}$

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3 years ago

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ycow [4]

Answer:

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Step-by-step explanation:

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Orlov [11]

Answer:

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Step-by-step explanation:

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