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Anvisha [2.4K]
3 years ago
11

Ni

Mathematics
1 answer:
OverLord2011 [107]3 years ago
3 0

Answer:

positive

why?

Step-by-step explanation:

the fraction has a squared of 2

so the fraction is negative

but when you multiply them twice you'll get positive integer

negative + negative = positive

then adding 1 still makes it positive

HOPE IT HELPS

<u><em>(FROM CROSS)</em></u>

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Can someone please solve this one? You can just give the answer and no explanation, I just need to get this in real quick.
Inessa05 [86]

Answer:

Step-by-step explanation:

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3. F

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3 0
3 years ago
Find the area of the polygon.<br> 2 cm<br> 3 cm<br> 1 cm<br> 3 cm<br> 4 cm
Natasha2012 [34]

Answer:

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4 0
2 years ago
If x = a cosθ and y = b sinθ , find second derivative
Olin [163]

I'm guessing the second derivative is for <em>y</em> with respect to <em>x</em>, i.e.

\dfrac{\mathrm d^2y}{\mathrm dx^2}

Compute the first derivative. By the chain rule,

\dfrac{\mathrm dy}{\mathrm dx}=\dfrac{\mathrm dy}{\mathrm d\theta}\dfrac{\mathrm d\theta}{\mathrm dx}=\dfrac{\frac{\mathrm dy}{\mathrm d\theta}}{\frac{\mathrm dx}{\mathrm d\theta}}

We have

y=b\sin\theta\implies\dfrac{\mathrm dy}{\mathrm d\theta}=b\cos\theta

x=a\cos\theta\implies\dfrac{\mathrm dx}{\mathrm d\theta}=-a\sin\theta

and so

\dfrac{\mathrm dy}{\mathrm dx}=\dfrac{b\cos\theta}{-a\sin\theta}=-\dfrac ba\cot\theta

Now compute the second derivative. Notice that \frac{\mathrm dy}{\mathrm dx} is a function of \theta; so denote it by f(\theta). Then

\dfrac{\mathrm d^2y}{\mathrm dx^2}=\dfrac{\mathrm df}{\mathrm dx}

By the chain rule,

\dfrac{\mathrm d^2y}{\mathrm dx^2}=\dfrac{\mathrm df}{\mathrm d\theta}\dfrac{\mathrm d\theta}{\mathrm dx}=\dfrac{\frac{\mathrm df}{\mathrm d\theta}}{\frac{\mathrm dx}{\mathrm d\theta}}

We have

f=-\dfrac ba\cot\theta\implies\dfrac{\mathrm df}{\mathrm d\theta}=\dfrac ba\csc^2\theta

and so the second derivative is

\dfrac{\mathrm d^2y}{\mathrm dx^2}=\dfrac{\frac ba\csc^2\theta}{-a\sin\theta}=-\dfrac b{a^2}\csc^3\theta

4 0
3 years ago
Plz help on this and explain how u got it, thanks have a nice day!
Anettt [7]

Answer:

i think the answer would be B and C

Step-by-step explanation:

hope it helps:)

7 0
3 years ago
Help me please!!!!!!!!!!
BlackZzzverrR [31]

Answer:

Option (4)

Step-by-step explanation:

In the picture attached,

m∠NLM = m∠LKN = 90°

In two similar triangles ΔLKN and ΔMKL,

By the property of similar triangles,

"Ratio of the corresponding sides of the similar triangles are proportional".

\frac{\text{LK}}{\text{KN}}=\frac{\text{KM}}{\text{LK}}

By substituting the values given,

\frac{h}{3}=\frac{2}{h}

\frac{2}{h}=\frac{h}{3}

Therefore, Option (4) will be the answer.

8 0
3 years ago
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