Integrals

Integral Forms & Antiderivatives

Basic Forms:

1. $\int udv=uv-\int vdu$
   
2. $\int u^{n}du=\frac{u^{n+1}}{n+1}+C,(n\ne -1)$
   
3. $\int \frac{du}{u}=\ln |u|+C$
   
4. $\int e^{u}du=e^u+C$
   
5. $\int a^{u}du=\frac{a^u}{\ln a}+C$
   
6. $\int \sin udu=-\cos u+C$
   
7. $\int \cos udu=\sin u+C$
   
8. $\int {\sec }^{2}udu=\tan u+C$
   
9. $\int {\csc }^{2}udu=-\cot u+C$
   
10. $\int \sec u\tan udu=\sec u+C$
    
11. $\int \csc u\cot udu=-\csc u+C$
    
12. $\int \tan udu=\ln |\sec u|+C$
    
13. $\int \cot udu=\ln |\sin u|+C$
    
14. $\int \sec udu=\ln |\sec u+\tan u|+C$
    
15. $\int \csc udu=\ln |\csc u-\cot u|+C$
    
16. $\int \frac{du}{\sqrt{a^2-u^2}}={\sin }^{-1}\frac{u}{a}+C,(a>0)$
    
17. $\int \frac{du}{a^2+u^2}=\frac{1}{a}{\tan }^{-1}\frac{u}{a}+C$
    
18. $\int \frac{du}{u\sqrt{u^2-a^2}}=\frac{1}{a}{\sec }^{-1}\frac{u}{a}+C$
    
19. $\int \frac{du}{a^2-u^2}=\frac{1}{2a}\ln \left|\frac{u+a}{u-a}\right|+C$
    
20. $\int \frac{du}{u^2-a^2}=\frac{1}{2a}\ln \left|\frac{u-a}{u+a}\right|+C$
    

Forms Involving: $\sqrt{a^2+u^2},a>0$

1. $\int \sqrt{a^2+u^2}du=\frac{u}{2}\sqrt{a^2+u^2}+\frac{a^2}{2}\ln (u+\sqrt{a^2+u^2})+C$
   
2. $\int u^2\sqrt{a^2+u^2}du=\frac{u}{8}(a^2+2u^2)\sqrt{a^2+u^2}-\frac{a^4}{8}\ln (u+\sqrt{a^2+u^2})+C$
   
3. $\int \frac{\sqrt{a^2+u^2}}{u}du=\sqrt{a^2+u^2}-a\ln \left|\frac{a+\sqrt{a^2+u^2}}{u}\right|+C$
   
4. $\int \frac{\sqrt{a^2+u^2}}{u^2}du=-\frac{\sqrt{a^2+u^2}}{u}+\ln (u+\sqrt{a^2+u^2})+C$
   
5. $\int \frac{du}{\sqrt{a^2+u^2}}=\ln (u+\sqrt{a^2+u^2})+C$
   
6. $\int \frac{u^{2}du}{\sqrt{a^2+u^2}}=\frac{u}{2}\sqrt{a^2+u^2}-\frac{a^2}{2}\ln (u+\sqrt{a^2+u^2})+C$
   
7. $\int \frac{du}{u\sqrt{a^2+u^2}}=-\frac{1}{a}\ln \left|\frac{\sqrt{a^2+u^2}+a}{u}\right|+C$
   
8. $\int \frac{du}{u^2\sqrt{a^2+u^2}}=-\frac{\sqrt{a^2+u^2}}{a^{2}u}+C$
   
9. $\int \frac{du}{(a^2+u^2{)}^{3/2}}=\frac{u}{a^2\sqrt{a^2+u^2}}+C$
   

Forms Involving: $\sqrt{a^2-u^2},a>0$

1. $\int \sqrt{a^2-u^2}du=\frac{u}{2}\sqrt{a^2-u^2}+\frac{a^2}{2}{\sin }^{-1}\frac{u}{a}+C$
   
2. $\int u^2\sqrt{a^2-u^2}du=\frac{u}{8}(2u^2-a^2)\sqrt{a^2-u^2}+\frac{a^4}{8}{\sin }^{-1}\frac{u}{a}+C$
   
3. $\int \frac{\sqrt{a^2-u^2}}{u}du=\sqrt{a^2-u^2}-a\ln \left|\frac{a+\sqrt{a^2-u^2}}{u}\right|+C$
   
4. $\int \frac{\sqrt{a^2-u^2}}{u^2}du=-\frac{1}{u}\sqrt{a^2-u^2}-{\sin }^{-1}\frac{u}{a}+C$
   
5. $\int \frac{u^{2}du}{\sqrt{a^2-u^2}}=-\frac{u}{2}\sqrt{a^2-u^2}+\frac{a^2}{2}{\sin }^{-1}\frac{u}{a}+C$
   
6. $\int \frac{du}{u\sqrt{a^2-u^2}}=-\frac{1}{a}\ln \left|\frac{a+\sqrt{a^2-u^2}}{u}\right|+C$
   
7. $\int \frac{du}{u^2\sqrt{a^2-u^2}}=-\frac{1}{a^{2}u}\sqrt{a^2-u^2}+C$
   
8. $\int (a^2-u^2{)}^{3/2}du=-\frac{u}{8}(2u^2-5a^2)\sqrt{a^2-u^2}+\frac{3a^4}{8}{\sin }^{-1}\frac{u}{a}+C$
   
9. $\int \frac{du}{(a^2-u^2{)}^{3/2}}=\frac{u}{a^2\sqrt{a^2-u^2}}+C$
   

Forms Involving: $\sqrt{u^2-a^2},a>0$

1. $\int \sqrt{u^2-a^2}du=\frac{u}{2}\sqrt{u^2-a^2}-\frac{a^2}{2}\ln |u+\sqrt{u^2-a^2}|+C$
   
2. $\int u^2\sqrt{u^2-a^2}du=\frac{u}{8}(2u^2-a^2)\sqrt{u^2-a^2}-\frac{a^4}{8}\ln |u+\sqrt{u^2-a^2}|+C$
   
3. $\int \frac{\sqrt{u^2-a^2}}{u}du=\sqrt{u^2-a^2}-a{\cos }^{-1}\frac{a}{|u|}+C$
   
4. $\int \frac{\sqrt{u^2-a^2}}{u^2}du=-\frac{\sqrt{u^2-a^2}}{u}+\ln |u+\sqrt{u^2-a^2}|+C$
   
5. $\int \frac{du}{\sqrt{u^2-a^2}}=\ln |u+\sqrt{u^2-a^2}|+C$
   
6. $\int \frac{u^{2}du}{\sqrt{u^2-a^2}}=\frac{u}{2}\sqrt{u^2-a^2}+\frac{a^2}{2}\ln |u+\sqrt{u^2-a^2}|+C$
   
7. $\int \frac{du}{u^2\sqrt{u^2-a^2}}=\frac{\sqrt{u^2-a^2}}{a^{2}u}+C$
   
8. $\int \frac{du}{(u^2-a^2{)}^{3/2}}=-\frac{u}{a^2\sqrt{u^2-a^2}}+C$
   

Forms Involving: $a+bu$

1. $\int \frac{udu}{a+bu}=\frac{1}{b^2}(a+bu-a\ln |a+bu|)+C$
2. $\int \frac{u^{2}du}{a+bu}=\frac{1}{2b^3}[(a+bu{)}^2-4a(a+bu)+2a^2\ln |a+bu|]+C$
3. $\int \frac{du}{u(a+bu)}=\frac{1}{a}\ln \left|\frac{u}{a+bu}\right|+C$
4. $\int \frac{du}{u^2(a+bu)}=-\frac{1}{au}+\frac{b}{a^2}\ln \left|\frac{a+bu}{u}\right|+C$
5. $\int \frac{udu}{(a+bu{)}^2}=\frac{a}{b^2(a+bu)}+\frac{1}{b^2}\ln |a+bu|+C$
6. $\int \frac{du}{u(a+bu{)}^2}=\frac{1}{a(a+bu)}-\frac{1}{a^2}\ln \left|\frac{a+bu}{u}\right|+C$
7. $\int \frac{u^{2}du}{(a+bu{)}^2}=\frac{1}{b^3}(a+bu-\frac{a^2}{a+bu}-2a\ln |a+bu|)+C$
8. $\int u\sqrt{a+bu}du=\frac{2}{15b^2}(3bu-2a)(a+bu{)}^{3/2}+C$
9. $\int \frac{udu}{\sqrt{a+bu}}=\frac{2}{3b^2}(bu-2a)\sqrt{a+bu}+C$
10. $\int \frac{u^{2}du}{\sqrt{a+bu}}=\frac{2}{15b^3}(8a^2+3b^2{u}^2-4abu)\sqrt{a+bu}+C$
11. $\int \frac{du}{u\sqrt{a+bu}}=\{\begin{array}{cc}\frac{1}{\sqrt{a}}\ln \left|\frac{\sqrt{a+bu}-\sqrt{a}}{\sqrt{a+bu}+\sqrt{a}}\right|+C& \text{if }a>0\\ \frac{2}{\sqrt{-a}}{\tan }^{-1}\sqrt{\frac{a+bu}{-a}}+C& \text{if }a<0\end{array}$
12. $\int \frac{\sqrt{a+bu}}{u}du=2\sqrt{a+bu}+a\int \frac{du}{u\sqrt{a+bu}}$
13. $\int \frac{\sqrt{a+bu}}{u^2}du=-\frac{\sqrt{a+bu}}{u}+\frac{b}{2}\int \frac{du}{u\sqrt{a+bu}}$
14. $\int u^n\sqrt{a+bu}du=\frac{2}{b(2n+3)}[u^n(a+bu{)}^{3/2}-na\int u^{n-1}\sqrt{a+bu}du]$
15. $\int \frac{u^{n}du}{\sqrt{a+bu}}=\frac{2u^n\sqrt{a+bu}}{b(2n+1)}-\frac{2na}{b(2n+1)}\int \frac{u^{n-1}du}{\sqrt{a+bu}}$
16. $\int \frac{du}{u^n\sqrt{a+bu}}=-\frac{\sqrt{a+bu}}{a(n-1)u^{n-1}}-\frac{b(2n-3)}{2a(n-1)}\int \frac{du}{u^{n-1}\sqrt{a+bu}}$

To Do

• Antiderivative DB search system.
• Find a use for the white-space on the right of the page.
• Integral Isolating System for easy reference/copying.