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Integral of 1/(z^4+1) dx

Limits of integration:

from to
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The graph:

from to

Piecewise:

The solution

You have entered [src]
  1          
  /          
 |           
 |    1      
 |  ------ dz
 |   4       
 |  z  + 1   
 |           
/            
0            
$$\int\limits_{0}^{1} \frac{1}{z^{4} + 1}\, dz$$
Integral(1/(z^4 + 1), (z, 0, 1))
The answer (Indefinite) [src]
  /                                                                                                                              
 |                   ___    /     2       ___\     ___     /        ___\     ___     /         ___\     ___    /     2       ___\
 |   1             \/ 2 *log\1 + z  - z*\/ 2 /   \/ 2 *atan\1 + z*\/ 2 /   \/ 2 *atan\-1 + z*\/ 2 /   \/ 2 *log\1 + z  + z*\/ 2 /
 | ------ dz = C - --------------------------- + ----------------------- + ------------------------ + ---------------------------
 |  4                           8                           4                         4                            8             
 | z  + 1                                                                                                                        
 |                                                                                                                               
/                                                                                                                                
$$\int \frac{1}{z^{4} + 1}\, dz = C - \frac{\sqrt{2} \log{\left(z^{2} - \sqrt{2} z + 1 \right)}}{8} + \frac{\sqrt{2} \log{\left(z^{2} + \sqrt{2} z + 1 \right)}}{8} + \frac{\sqrt{2} \operatorname{atan}{\left(\sqrt{2} z - 1 \right)}}{4} + \frac{\sqrt{2} \operatorname{atan}{\left(\sqrt{2} z + 1 \right)}}{4}$$
The graph
The answer [src]
    ___    /      ___\        ___     ___    /      ___\
  \/ 2 *log\2 - \/ 2 /   pi*\/ 2    \/ 2 *log\2 + \/ 2 /
- -------------------- + -------- + --------------------
           8                8                8          
$$- \frac{\sqrt{2} \log{\left(2 - \sqrt{2} \right)}}{8} + \frac{\sqrt{2} \log{\left(\sqrt{2} + 2 \right)}}{8} + \frac{\sqrt{2} \pi}{8}$$
=
=
    ___    /      ___\        ___     ___    /      ___\
  \/ 2 *log\2 - \/ 2 /   pi*\/ 2    \/ 2 *log\2 + \/ 2 /
- -------------------- + -------- + --------------------
           8                8                8          
$$- \frac{\sqrt{2} \log{\left(2 - \sqrt{2} \right)}}{8} + \frac{\sqrt{2} \log{\left(\sqrt{2} + 2 \right)}}{8} + \frac{\sqrt{2} \pi}{8}$$
-sqrt(2)*log(2 - sqrt(2))/8 + pi*sqrt(2)/8 + sqrt(2)*log(2 + sqrt(2))/8
Numerical answer [src]
0.866972987339911
0.866972987339911

    Use the examples entering the upper and lower limits of integration.