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2 years ago

Help please help please

Mathematics

2 answers:

kramer2 years ago

8 0

Answer:

angles shouldn't you use a protractor

Step-by-step explanation:

Rasek [7]2 years ago

8 0

Answer:

x+140°=180°

x+140°-140°=180°-140°

x+0=180°-140°

x=40°

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3 years ago

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4 years ago

When printing an article of 2400 words, an entrepreneur decides to use two sizes of letters, using the largest one a printed pag

olga55 [171]

Step-by-step explanation:

x= Number of small pages

y= Number of full pages

1 x + 1 y = 21 .............1

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3 years ago

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timofeeve [1]

Answer:

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Step-by-step explanation:

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3 years ago

Read 2 more answers

Use the definition of taylor series to find the taylor series (centered at

Alexxandr [17]

Cos(x) is infinitely differentiable, can be expanded using Taylor's series.
The series about c can be expressed as
$f(x)=\sum_{n=0}^{\infty}\frac{f^{n}(c)}{n!}(x-c)^n$
Substituting cos(x), c= π /4,we have
$cos(x)=\sum_{n=0}^{\infty}\frac{f^{n}(\frac{\pi}{4})}{n!}(x-\frac{\pi}{4})^n$
and since
$f'(\frac{\pi}{4})=-sin(\frac{\pi}{4})=-\sqrt{2}/2$
$f"(\frac{\pi}{4})=-cos(\frac{\pi}{4})=-\sqrt{2}/2$
$f^{(iii)}(\frac{\pi}{4})=sin(\frac{\pi}{4})=\sqrt{2}/2$
$f^{(iv)}(\frac{\pi}{4})=cos(\frac{\pi}{4})=\sqrt{2}/2$

we can simplify the expansion to
$cos(x)=\frac{\sqrt{2}}{2}(1-(x-\frac{\pi}{4})/1!-(x-\frac{\pi}{4})^2/2!+(x-\frac{\pi}{4})^3/3!+(x-\frac{\pi}{4})^4/4!-(x-\frac{\pi}{4})^5/5!-...)$
Note that the sign pattern is - - + + - - + + - - ..... following the sign pattern of the derivatives of cos(x).

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3 years ago