Melody

add 1 to both sides then divide both sides by 6.

You do not need to reverse the sign or anything like that.

Yes you are right guest.

Asad, Admin would not have like you using 'web2.0calc' as a part of this second username, and also you were using a variation on his icon I think.

At this moment your initial username is still valid. 

I cannot see any reason why you cannot access your account.

I think you already know that I am not admin and I have no knowledge of the programming sides of things. 

Perhaps you have enetered the wrong password or perhaps it is a glitch and will be fixed soon. :/

I am sorry you ae having problems. 

You need to give us the definition of a 'valid word'

What do you mean by 'test the word'

Your question does not make sense.

I would not say that trigonometric functions are based on the unit circle but it is certainly true that 

asin(x) only is defined (has a value)   for    

\(-1\le x\le1\)

Subtract 3 from BOTH sides

then

divide BOTH sides by 3

0.612=(0.352x0.352)/x

\(0.612\times x=\frac{(0.352\times 0.352)}{x}\times x\\ 0.612\times x=0.352^2\\ x=\frac{0.352^2}{0.612} \)

0.352^2/0.612 = 0.2024575163398693

Can you simplify this x+9/-x+9?

I expect you mean     

Can you simplify this (x+9)/(-x+9)?

and the answer is no, although you could present it as   (x+9)/(9-x)

That looks a little nicer I think.

oh it is a square so length l and breadth b will be the same

\(d^2=2l^2\\ d=\sqrt{2l^2}\;\;units\)