Cos 90 - 2sin45 + 2tan180

Mathematics

1 answer:

riadik2000 [5.3K]1 year ago

4 0

Answer:

- $\sqrt{2}$

Step-by-step explanation:

cos90° - 2sin45° + 2tan180°

= 0 - ( 2 × $\frac{\sqrt{2} }{2}$ ) + 2(0)

= 0 - $\sqrt{2}$ + 0

= - $\sqrt{2}$

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Calcula el lado y el área de un poligono regular 12 lados sabiendo que su radio es de 7,727dmy su apotema de 7,464

Vika [28.1K]

Answer:

$L=3.999 \: dm$

$A=183.4581\:dm^{2}$

Step-by-step explanation:

La relación del apotema y el lado de un dodecágono regular está dada por la siguiente ecuación:

$a_{p}=L\frac{2+\sqrt{3}}{2}$

Sabiendo que la apotema es 7.464 el lado sera:

$L=\frac{2*a_{p}}{2+\sqrt{3}}$

$L=\frac{2*7.464}{2+\sqrt{3}}$

$L=3.999 \: dm$

Por otro lado el area de un dodecágono regular esta dada por:

$A=6a_{p}L$

$A=6*7.646*3.999$

$A=183.4581\:dm^{2}$

Espero te haya sido de ayuda!

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3 years ago

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enyata [817]

Answer:

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Step-by-step explanation:

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