# Should I add a constant $C$ in this step of doing an integral?

Should I add a constant $C$ in this step?

\begin{align*} \int \left(\sec^2x \, dx - \sec x \tan x \, dx\right) &= \tan x - \int \sec x \tan x \, dx\\\\ \int \left(\sec^2x \, dx - \sec x \tan x \, dx\right) &= \tan x + C - \int \sec x \tan x \, dx \end{align*}

• Just add a constant when you are finished. Sep 17 '13 at 3:02
• You can see here how I edited your question. Please see here for a guide to writing math with MathJax, and see here for a guide to formatting posts with Markdown. Sep 17 '13 at 3:06

• A day late and a dollar short. The dollar: consider $e^{\int\! f(x)\,dx}$ Sep 17 '13 at 3:05