All Answers 358524 Answers

WOW heureka, you just saved us a grey cell explosing. 

This is excellent as they are known to be quite messy!

oh wow completely forgot that it might be in rad. 
Thanks you just saved my mind from blowing up!

Do arctan(2) in rad - modus. You get $$1.10714871779\ rad$$

Do arctan(2) in degree - modus. You get $$63.4349488229\ensurement{^{\circ}}$$

$$\\ 63.4349488229\ensurement{^{\circ}} \cdot \frac{\pi}{180} = 1.10714871779\ rad \\\\
1.10714871779\ rad \cdot \frac{180}{\pi} =63.4349488229\ensurement{^{\circ}} \\$$

314.1592.....

5/7 as a decimal is 0.7

Ishmal invested £3500 for 3 years at 2.5% per annum simple interest. Work out the total amount of interest Ishmal earned.

I=Prt        P=3500,       r=2.5/100     t=3

You can do the substitution 

@@ End of Day Wrap   Wed 18/3/15     Sydney, Australia Time   11:50 pm     ♪ ♫

Good evening everyone,

You have probably seen it before Chris, it has been floating about the forum for a year now.  :)

Thurs 19/3/15

$$\\175^{1/2}\\
=\sqrt{175}\\
=\sqrt{25*7}\\
=\sqrt{25}*\sqrt{7}\\
=5\sqrt{7}\\$$

Thanks, Melody......I'll take a look at that, too....!!!!

You may enjoy this clip.  :)

There is no "formula"..........there are a number of algorithms used in testing for primes....but......so far......nobody has ever developed a foolproof "formula" for detecting whether a specific number is prime, or not

Hi Samgelinas

It is really great to see you posting again Sam,  I missed you when you disappeared :)

Welcome back  !!!

You have some unopened mail.  :)

Not many people can answer physics questions.  

If you repost maybe you will have more success.

You need to ask someone with synesthesia, they will be able to tell you although they may have different answers from one another.

Using the identity

tan( u - v) = [ tan u - tan v ] / [1 + tan u * tan v]

So we have

tan ( x - pi/3)  =  [ tan x - tan((pi/3) ] / [ 1 + tanx * tan (pi/3) ] =

[tanx  - √3 ] / [ 1 +  √3 tanx]

So.....  4  is correct

$$8.148\times 10^{-7}$$

just move the point over 7 digits to make the number part smaller.

Hint:   you will need to add some zeros to jump over.     :)

Not quite anon

20÷2(5+5)

$$\\20\div2*(5+5)\\
=10*10\\
=100$$

Chicken tastes like crocodile too :)

I haven't tasted rattlesnake      I know, i will just eat some croc and pretend it is rattlesnake :))

No most likely not since I only just saw this post (6 hour later)  I am glad I was missed anyway.  

$$\\\frac{1}{11}\div \frac{11}{1}\\\\
=\frac{1}{11}\times \frac{1}{11}\\\\
=\frac{1}{121}$$

$${\sqrt{{\mathtt{49}}}} = {\mathtt{7}}$$       can't get much closer than that :)