3 years ago

Solve using factoring

Mathematics

1 answer:

irina1246 [14]3 years ago

4 0

Answer: you can use Photomath

Step-by-step explanation:

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Find the area of the surface correct to four decimal places by expressing the area in terms of a single integral and using your

love history [14]

If we substitute $x=r\cos\theta$ and $y=r\sin\theta$ , we get $r^2=x^2+y^2$ , so that

$z=\cos(x^2+y^2)=\cos(r^2)$

which is independent of $\theta$ , which in turn means the surface can be treated like a surface of revolution.

Consider the function $f(t)=\cos(t^2)$ defined over $0\le t\le1$ . Revolve the curve $C$ described by $f(t)$ about the line $t=0$ . The area of the surface obtained in this way is then

$\displaystyle2\pi\int_C\mathrm dS=2\pi\int_0^1\sqrt{1+f'(t)^2}\,\mathrm dt$

$=\displaystyle2\pi\int_0^1\sqrt{1+(-2t\sin(t^2))^2}\,\mathrm dt$

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3 years ago

Fill in the blank with the correct number.

White raven [17]

Step-by-step explanation:

I think both 3 and 9

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2 years ago

Solve for x:x-7=-20<br>1)13<br>2)27<br>3)-13<br>4)-3

Marianna [84]

3.)-13

x-7= -20

x = -20+7

x= -13

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3 years ago

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Is it true or false

3241004551 [841]

True.

I hope this helps you

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3 years ago

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Expression Name

user100 [1]

Answer:

Step-by-step explanation:

9+(-3) = 6

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3 years ago