Mathematics: PLEASE HELP ! . Naher has a mirror in a shape of a circle. The circle has a diameter of 60 cm. Naher buys metal strips to put around the edge of the mirror. The metal strip is sold in lengths of one meter. Each one meter length of metal strip costs £5.68 Work out the total amount Naher paid.

In polar coordinates, we haveFrom this we can writeIf , then , so we get...

PLEASE HELP ! . Naher has a mirror in a shape of

Ответ:

yzafer3971

29.01.2022

Mathematics

£323.76

Step-by-step explanation:

Circumference = 2πr

= 2 x π x 30^2

= 2 x π x 900

= 1800π = 5654.9 cm = 56.549 meters

Amount paid 57m x £5.68 = £323.76

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Ответ:

camilacarrielh15

08.06.2021

Mathematics

In polar coordinates, we have

$x=r\cos\theta\implies\cos\theta=\dfrac xr$
$y=r\sin\theta\implies\sin\theta=\dfrac yr$

From this we can write

$\tan\theta=\dfrac{\sin\theta}{\cos\theta}=\dfrac{\frac yr}{\frac xr}=\dfrac yx$

If $\theta=\dfrac{4\pi}3$ , then $\tan\theta=\sqrt$ , so we get

$\dfrac yx=\sqrt3\implies y=\sqrt3\,x$

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PLEASE HELP ! .
Naher has a mirror in a shape of a circle.
The circle has a diameter of 60 cm.
Naher buys metal strips to put around the edge of the mirror.
The metal strip is sold in lengths of one meter.
Each one meter length of metal strip costs £5.68
Work out the total amount Naher paid.

Ответ:

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