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3 years ago

I need help please!!

Mathematics

2 answers:

Usimov [2.4K]3 years ago

8 0

Answer:

Step-by-step explanation:

radius r = 5 cm

Height h = 5 cm

Volume of cylinder = πr²h

= π * 5 * 5 * 5

= 125π cm³

Rasek [7]3 years ago

7 0

Answer:

250π

Step-by-step explanation:

The formula for finding the volume of a cylinder is πr^2h

So, you just substitute the values:

π x 5^2 x 2(5)

Then simplify,

π x 25 x 10

To then get 250π

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7 0

3 years ago

Read 2 more answers

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masha68 [24]

Answer: 25

Step-by-step explanation:

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4 0

3 years ago

I have school in 2 hours and i really need help

erik [133]

Answer:

$\sqrt[3]{8 + 6} = \sqrt[3]{14} \\ = 2.41$

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3 0

3 years ago

Use the figure below and 2-3 sentences to explain the following:

nydimaria [60]

Answer:

See below

Step-by-step explanation:

The side opposite angle E is side e (DF)

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The hypotenuse is side f (ED)

5 0

3 years ago

If sinA=√3-1/2√2,then prove that cos2A=√3/2 prove that

Ivan

Answer:

$\boxed{\sf cos2A =\dfrac{\sqrt3}{2}}$

Step-by-step explanation:

Here we are given that the value of sinA is √3-1/2√2 , and we need to prove that the value of cos2A is √3/2 .

Given :-

• $\sf\implies sinA =\dfrac{\sqrt3-1}{2\sqrt2}$

To Prove :-

• $\sf\implies cos2A =\dfrac{\sqrt3}{2}$

Proof :-

We know that ,

$\sf\implies cos2A = 1 - 2sin^2A$

Therefore , here substituting the value of sinA , we have ,

$\sf\implies cos2A = 1 - 2\bigg( \dfrac{\sqrt3-1}{2\sqrt2}\bigg)^2$

Simplify the whole square ,

$\sf\implies cos2A = 1 -2\times \dfrac{ 3 +1-2\sqrt3}{8}$

Add the numbers in numerator ,

$\sf\implies cos2A = 1-2\times \dfrac{4-2\sqrt3}{8}$

Multiply it by 2 ,

$\sf\implies cos2A = 1 - \dfrac{ 4-2\sqrt3}{4}$

Take out 2 common from the numerator ,

$\sf\implies cos2A = 1-\dfrac{2(2-\sqrt3)}{4}$

Simplify ,

$\sf\implies cos2A = 1 -\dfrac{ 2-\sqrt3}{2}$

Subtract the numbers ,

$\sf\implies cos2A = \dfrac{ 2-2+\sqrt3}{2}$

Simplify,

$\sf\implies \boxed{\pink{\sf cos2A =\dfrac{\sqrt3}{2}} }$

Hence Proved !

8 0

3 years ago