I have an multiline equation and I want to do a frame around all the equation, that have two lines. I don't know what's the method to do it without code.
\dfrac{\sen(l'+l)}{\sen(l'-l)}=\dfrac{2\,\sen\nicefrac{1}{2}(L'+L-2\alphaup)\cdot\cos\nicefrac{1}{2}(L'-L)}{2\,\cos\nicefrac{1}{2}(L'+L-2\alphaup)\cdot\sen\nicefrac{1}{2}(L'-L)}=
=\dfrac{\sen[\nicefrac{1}{2}(L'+L)-\alphaup]\cdot\cos\nicefrac{1}{2}(L'-L)}{\cos[\nicefrac{1}{2}(L'+L)-\alphaup]\cdot\sen\nicefrac{1}{2}(L'-L)}=\dfrac{\tg[\nicefrac{1}{2}(L'+L)-\alphaup]}{\tg\nicefrac{1}{2}(L'-L)}
Thank you.
LyX ⇒ Frames
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Frames
I don't know how that could be automated, but the
Load at least the
to the preamble, if you want to avoid the larger space in the upper part of the box and there is no other type of box.
If you have already done a lot with the
You will have to create a
minimal working example, if my advices could not help you.
tcolorbox package is able to frame equations.Load at least the
theorems library and add Code: Select all
\tcbset{ams nodisplayskip}to the preamble, if you want to avoid the larger space in the upper part of the box and there is no other type of box.
If you have already done a lot with the
nicefrac package, then I'd like to draw your attention to xfrac, if you can use it for further documents.You will have to create a
minimal working example, if my advices could not help you.