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```        urgent
can you please help me out by telling some substitutions that can be done to solve indefinite integration
```
8 years ago

SAGAR SINGH - IIT DELHI
879 Points
```										Dear student,
For terms of  the form x2 + a2 or  √x2 + a2, put x = a tanθ or a cotθ

For  terms of the form x2 - a2 or √x2 – a2 ,  put x = a sec θ or a cosecθ

For  terms of the form a2 - x2 or √x2 + a2,  put x = a sin θ or a cosθ

•         If  both √a+x, √a–x,   are present, then put x = a cos θ.

•         For  the type √(x–a)(b–x),  put x = a cos2θ + b sin2θ
Win exciting gifts by answering the questions  on Discussion Forum.So help discuss any query on askiitians  forum and become an Elite Expert League askiitian.Please  feel  free to post as many doubts on our discussion forum as you can.we  will  get you the answer and detailed  solution very  quickly.All the  best.Regards,Askiitians ExpertsSagar Singh

```
7 years ago
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