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3 years ago

Plz help fast solve this

Mathematics

2 answers:

torisob [31]3 years ago

4 0

Answer:

Step-by-step explanation:

Math simplification

Natalija [7]3 years ago

3 0

Answer:

A=3, B=1, C=2

Step-by-step explanation:

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3 years ago

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lianna [129]

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3 years ago

HELP PLEASE

Kazeer [188]

Answer:

2,360.95

Step-by-step explanation:

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3 years ago

Approximate cos (12π/ 13) by using a linear approximation with f (x) = cos x.

Katarina [22]

First pick a value of $x$ close to $\dfrac{12\pi}{13}$ . You should be fine with $x=\pi$ .

The linear approximation of $f(x)$ at $x=c$ is given by

$f(c)\approx f(a)+f'(a)(c-a)$

where $x=a$ is some fixed value close to $x=c$ . You have

$f(x)=\cos x\implies f'(x)=-\sin x$

so

$f\left(\dfrac{12\pi}{13}\right)\approx f(\pi)+f'(\pi)\left(\dfrac{12\pi}{13}-\pi\right)$
$\cos\dfrac{12\pi}{13}\approx\cos\pi-\sin(\pi)\left(-\dfrac\pi{13}\right)$
$\cos\dfrac{12\pi}{13}\approx-1$

The actual value is closer to -0.9709, so the approximation is decent.

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3 years ago

What is y+7/3=y/3 i really need help fast

Y_Kistochka [10]

Y should equal -7/2 or -3.5

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3 years ago