What is the approch of solving problems on integration? Please give some tips.

While solving the problems on integration you should have following apporach,

1)Try to simplify the terms using algebriac or trigonometric identities/conversions

2) Analyse which method you can apply like rationalization or partial fractions or by parts etc. to simplify terms.

3) Check for any substitution which can be used

4) Use integration formulas to get final result