Introduction
Integration is just reverse of differentiation so you must have to learn some basic integration formulas.
here the questions we are going to discuss are tricky by look but believe me these are simple enough if notice them carefully
1) Lets start with some light one first
This question is also looking simple by look but most of the students did mistake in the solution by converting the given term into sin or cos but the simple step is to rationalize and after rationalize you will get a better way to the answer
Here is the Answer But always try from yourself
3) EvaluateIn this question you have to take the longest chain as T and then diffrentiate it both sides w.r.t x
and then you will obtain a relation of substitution