Q. 63.7( 3 Votes )

Evaluate: <span l

Answer :

Let, I =


Putting



When, x = 0,



x = 2,



I =


= 2


= 2 { 2cos2θ = 1 + cos 2θ}


= 2


= 2


= 2 [π/2]


=


The required value is π.


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