I need to write something like this in latex:

enter image description here

I can use \Big\{ or \bigg\{, but the problem is that all I write next goes on a single line. I need to embed the bracket into two lines, how to do that in latex?

  • 1
    Please add your MWE (your current code) to the post, it will help us to start working on it. – Malipivo Apr 3 '14 at 11:18
  • The common solution to this looks something like this: \left\{ \begin{array}{ccc} ... \end{array} \right. ... – Malipivo Apr 3 '14 at 11:19

use mathtools, which is an extended amsmath and also \left...\right:

  C_2 = 
      0.45 \times \dfrac{\sigma^2}{\sigma^2+0.09}
        \times \sin \alpha
    & \text{if $\gamma \geq 0$}
      0.45 \times \dfrac{\sigma^2}{\sigma^2+0.09}
        \times \left(\sin \alpha - \left(\dfrac{2 \beta}{\pi}\right)^3\right)
      & \text{otherwise}

enter image description here

| improve this answer | |
  • 1
    cases just requires amsmath; it's dcases that requires mathtools; within dcases \dfrac can be \frac and the vertical spacing is improved. – egreg Apr 3 '14 at 12:01
  • It ia always a good idea to load mathtools instead of amsmath ... – user2478 Apr 3 '14 at 13:23
  • And the starred versions suppose the second part is text, so you don't have to type \text a number of times. – Bernard Apr 3 '14 at 15:23

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