I am using ShareLaTeX for assignment.

I want to input an equation like:


and got output like this:

square root with short cap

But I really want the square root with longer cap (or roof? I am not sure how to call it, and therefore I am not able to search the solution) like this:

square root with long cap that cover the content in sqrt

Wondering how I can fix that.

  • 7
    \sqrt{\frac{2K\lambda}{h}}, not \sqrtsign(\frac{2K\lambda}{h}). Notice the braces. I don't think \sqrtsign is documented anywhere; if it is recommended in some manual, throw it away. – egreg Sep 22 '14 at 21:49
  • Ahh... my bad, actually \sqrt also doesn't work... I will edit the post. – oldfatcrab Sep 22 '14 at 22:01
  • Emphasis on @egreg s comment part Notice the braces you have parentheses. – percusse Sep 22 '14 at 22:04
  • \sqrt{} should work. Could your limit your code to \documentclass{<something>}\usepackage{<somepackage>}\begin{document}$EOQ=Q^*=\sqrt{\frac{2K\lambda}{h}}$\end{document}? – 1010011010 Sep 22 '14 at 22:04
  • Right, it is caused by the braces. Thank you both! – oldfatcrab Sep 22 '14 at 22:31

The \sqrt command takes as a mandatory argument what's to be extracted the square root of.

So the correct syntax is


not \sqrt(a+b). Your problem is solved by using


If you need the cube root (or other roots), there's the optional argument:


In a previous version of your question you had \sqrtsign: this macro actually exists for historical reasons, but is not documented and should not be used in documents.

| improve this answer | |

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.