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Charra [1.4K]
3 years ago
5

There are 28 students in 4th grade class. Each table in the classroom seats 8 students. How many tables will be needed to seat a

ll of the students?
Mathematics
2 answers:
tresset_1 [31]3 years ago
7 0

Answer: 4 tables

Step-by-step explanation:

3 tables wouldn't be enough because there would only be 24 seats. 4 tables would have 32 seats (so a little extra).

lozanna [386]3 years ago
7 0

Answer:

4 tables

Step-by-step explanation:

3 tables wouldnt be enoungh

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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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