All categories

3 years ago

Solve the triangles. Round to the nearest tenth А 7 B 6 C

Mathematics

1 answer:

lisov135 [29]3 years ago

7 0

Answer:

Sure but can you show me the triangle.

You might be interested in

A torus is formed by rotating a circle of radius r about a line in the plane of the circle that is a distance R (> r) from th

jeyben [28]

Consider a circle with radius $r$ centered at some point $(R+r,0)$ on the $x$ -axis. This circle has equation

$(x-(R+r))^2+y^2=r^2$

Revolve the region bounded by this circle across the $y$ -axis to get a torus. Using the shell method, the volume of the resulting torus is

$\displaystyle2\pi\int_R^{R+2r}2xy\,\mathrm dx$

where $2y=\sqrt{r^2-(x-(R+r))^2}-(-\sqrt{r^2-(x-(R+r))^2})=2\sqrt{r^2-(x-(R+r))^2}$ .

So the volume is

$\displaystyle4\pi\int_R^{R+2r}x\sqrt{r^2-(x-(R+r))^2}\,\mathrm dx$

Substitute

$x-(R+r)=r\sin t\implies\mathrm dx=r\cos t\,\mathrm dt$

and the integral becomes

$\displaystyle4\pi r^2\int_{-\pi/2}^{\pi/2}(R+r+r\sin t)\cos^2t\,\mathrm dt$

Notice that $\sin t\cos^2t$ is an odd function, so the integral over $\left[-\frac\pi2,\frac\pi2\right]$ is 0. This leaves us with

$\displaystyle4\pi r^2(R+r)\int_{-\pi/2}^{\pi/2}\cos^2t\,\mathrm dt$

Write

$\cos^2t=\dfrac{1+\cos(2t)}2$

so the volume is

$\displaystyle2\pi r^2(R+r)\int_{-\pi/2}^{\pi/2}(1+\cos(2t))\,\mathrm dt=\boxed{2\pi^2r^2(R+r)}$

6 0

3 years ago

If s ( x ) = 2 - x² and t ( x ) = 3x, what is s ( t ( -7 ) )?

ankoles [38]

Answer:

s (t (-7))=?

Step-by-step explana

s (t (-7))= -7s t

5 0

3 years ago

Here you go the brainless

Mrac [35]

$m= \frac{y_1-y_2}{x_1-x_2} \\ m= \frac{4-(-1)}{-4-1 } \\ m= \frac{5}{-5} \\ m=-1$

4 0

3 years ago

Please help please ASAP please help please I’ll mark you as a brnlist

FrozenT [24]

Answer:

i think its no triangle can be formed.... if it aint right im sorry 7th grade was a long time ago

Step-by-step explanation:

3 0

3 years ago

NEED AN ANSWER ASAP!!! WILL REWARD HANDSOMELY!!!

Mrrafil [7]

I think the answer will be 5?

5 0

2 years ago

Read 2 more answers

Solve the triangles. Round to the nearest tenth А 7 B 6 C​

Solve the triangles. Round to the nearest tenth А 7 B 6 C