itbpF50.75pt21.75pt6ptex3.wmfExpand tan $\left(\vphantom{ a+b}\right.$a + b$\left.\vphantom{ a+b}\right)$

  1. ClickitbpF20.125pt20.125pt2pttext.wmfor, from the Insert menu, choose Math to start mathematics.

  2. Type tan. Scientific Notebook automatically recognizes the trigonometric function and displays it on your screen in gray.

  3. ClickitbpF19.8125pt18.9375pt2ptparens.wmfand type a+b.

  4. ClickitbpF22.4375pt21.0625pt2ptexpand.wmfor, from the Maple menu, choose Expand. After the computation, you see this result:

\fbox{$ \begin{tabular}{lll} & \rule[-0.2in]{0in}{0.45in}$\tan \left( a+b\right) =\allowbreak \dfrac{\tan b+\tan a}{1-\tan b\tan a}$ & \end{tabular} $}