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28,316.85cm^3 = 28,316.85ml = 28,316.85 divided by 1000 L = 28.31685 Litres

Inverse cos is the same as arccos

On this calc you use acos

Yes, yes, very funny RandomGuy :))

$$\\\sqrt{x}-5-7=11\\
\sqrt{x}-12=11\\
\sqrt{x}=23\\
x=23^2\\
x=529$$

It depends on what you want to use it for.

the web2 calc is good for many things but not for everything :)

ok I'll do it to 3 significant figures

0.013562

ignore all zeros on the left

so the first significant figure is 1

the second is 3

the third might be 5 but since this is the last one that we want look at the next place to see if it should be rounded up.  The next digit is 6 (it is big which means it is 5 or more) so the third significant figure is rounded up from 5 to 6

so the answer is  0.0136

The acceleration is given by ω²r = 0.35²*55 = 6.7375 m/s²

The number of 'g's is 6.7375/9.81 ≈ 0.7g

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Take a look at this clip.

It is on the seive on eratosthenes.  It'll show you how you can find all the prime numbers up to 100.

You can use it to find higher ones as well if you want to :)

$$\sqrt[4]{625}=625^{1/4}$$

so you can enter    625^(1/4)

$${{\mathtt{625}}}^{\left({\frac{{\mathtt{1}}}{{\mathtt{4}}}}\right)} = {\mathtt{5}}$$

Hi Geno, 

I happen to know that Geno just loves rhinoceroses.  

So I think we should give Geno lots of rhinos to show how much he is appreciated around here.    

This one would look great in your yard Geno.  It is cute and creepy too. 

$${{\mathtt{10}}}^{{\mathtt{1.969}}} = {\mathtt{93.110\: \!787\: \!546\: \!783\: \!033\: \!5}}$$

Yes, you could do, as there is a "c" to wrap up the constants (though you would change the cos term to a sin term as per your original question!)

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look here

It is already in scientific notation. 

Lpook at this post.

40.5=4.05*10

So here can I wrote $$\frac{3}{8}x$$ insted of $$\frac{3}{8}(x-3)$$  ? 

Thanks Rosala, don't stop writing your "Laughs"

I love them and I suspect they are read by more people than you realise.

Remember there is a lot of people who read posts who never comment on anything but that does not mean that they do not enjoy them.

I like the wedding cake only we need a balancing wedding display where the husband has his wife chained to the sink or something. LOL   

$$\frac{1}{2}\int (1+\cos{2(x+1)})dx=\frac{1}{2}\int dx+\frac{1}{2}\int \cos{2(x+1)}dx$$

so the single x comes from the first integral on the right-hand side. However, you could add whatever constant you like, because, as it's an indefinite integral, any other constants are accounted for in the "c" at the end.

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Thanks Brittany,

Can you tell us why this is the formula.  

and what do you do if the angle is in degrees???   

Thanks Quentin, but you need to add some working or the asker cannot learn anything. 

if y=x^2+2x-3, what is y when x=-4?

$$\\y=(-4)^2+2*(-4)-3\\
y=16+-8-3\\
y=16-8-3\\
y=5$$