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3 years ago

13

I will give you that Brainly crown thing if it’s right

1 answer:

leonid [27]3 years ago

4 0

Answer: 21st Floor

Step-by-step explanation:

(46/2)-2

23-2

21

You might be interested in

Two functions are_______

n200080 [17]

Always, i think it’s the answer

4 0

2 years ago

Consider the line integral Z C (sin x dx + cos y dy), where C consists of the top part of the circle x 2 + y 2 = 1 from (1, 0) t

pashok25 [27]

Direct computation:

Parameterize the top part of the circle $x^2+y^2=1$ by

$\vec r(t)=(x(t),y(t))=(\cos t,\sin t)$

with $0\le t\le\pi$ , and the line segment by

$\vec s(t)=(1-t)(-1,0)+t(2,-\pi)=(3t-1,-\pi t)$

with $0\le t\le1$ . Then

$\displaystyle\int_C(\sin x\,\mathrm dx+\cos y\,\mathrm dy)$

$=\displaystyle\int_0^\pi(-\sin t\sin(\cos t)+\cos t\cos(\sin t)\,\mathrm dt+\int_0^1(3\sin(3t-1)-\pi\cos(-\pi t))\,\mathrm dt$

$=0+(\cos1-\cos2)=\boxed{\cos1-\cos2}$

Using the fundamental theorem of calculus:

The integral can be written as

$\displaystyle\int_C(\sin x\,\mathrm dx+\cos y\,\mathrm dy)=\int_C\underbrace{(\sin x,\cos y)}_{\vec F}\cdot\underbrace{(\mathrm dx,\mathrm dy)}_{\vec r}$

If there happens to be a scalar function $f$ such that $\vec F=\nabla f$ , then $\vec F$ is conservative and the integral is path-independent, so we only need to worry about the value of $f$ at the path's endpoints.

This requires

$\dfrac{\partial f}{\partial x}=\sin x\implies f(x,y)=-\cos x+g(y)$

$\dfrac{\partial f}{\partial y}=\cos y=\dfrac{\mathrm dg}{\mathrm dy}\implies g(y)=\sin y+C$

So we have

$f(x,y)=-\cos x+\sin y+C$

which means $\vec F$ is indeed conservative. By the fundamental theorem, we have

$\displaystyle\int_C(\sin x\,\mathrm dx+\cos y\,\mathrm dy)=f(2,-\pi)-f(1,0)=-\cos2-(-\cos1)=\boxed{\cos1-\cos2}$

3 0

3 years ago

Select all sequences that are geometric.

Leto [7]

Answer:

A,C and E

Step-by-step explanation:

because Im the only one thats answered your question so you don't exactly have anything else to go off of

8 0

2 years ago

Help me PLease<br><br><br><br> also explain how to do it

Lady bird [3.3K]

❥ $\Large\pmb{ \underline {\tt Answer}}$

So we can only find x if other two angles of triangle is given.

In angle B as u can see boxed shape angle is there then it probably means it's a 90° angle.

We know sum of angles of triangle = 180°

{Reson :-

There's a formula to fund sum of angles of figure

(n-2) × 180
(3 -2) × 180
1 × 180
180°

}

Now Let's proceed

$\boxed{ \rm Side_1+Side_2+Side_3 = 180\degree}$

Fill all the given values

$\dashrightarrow \tt 90 \degree + 55 \degree + c = 180 \degree$

$\\ \\$

$\dashrightarrow \tt 145\degree + c = 180 \degree$

$\\ \\$

$\dashrightarrow \tt c = 180 \degree - 145\degree$

$\\ \\$

$\dashrightarrow \tt c = 35\degree$

$\\ \\$

Value of x = 35°

~BrainlyVIP ⸙

8 0

2 years ago

The present shown below is a cube.<br> Find the surface area of the present.

Kruka [31]

To answer this you need to multiply 20 by 20. this gives 400cm
or you can also square 20

3 0

3 years ago

Read 2 more answers