Mathematics: NEED RN, WORTH 20! What is the value of x?

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

NEED RN, WORTH 20! What is the value of x? - id205816243, Sillydork4545

Ответ:

penelope0

22.01.2022

Mathematics

x = 5.625

Step-by-step explanation:

Step 1: Make an expression

$\frac{3}{4} = \frac{x}{7.5}$

Step 2: Cross Multiply

$\frac{3}{4} = \frac{x}{7.5}$

4 * x = 7.5 * 3

4x = 22.5

Step 3: Divide both sides by 4

4x / 4 = 22.5 / 4

x = 5.625

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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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NEED RN, WORTH 20!
What is the value of x?

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