Q. 274.0( 4 Votes )

Solve: [Hint: Substitute x + y = z]

Answer :


Using the hint given and substituting x + y = z



Differentiating z – x with respect to x





Integrate



We know that cos 2z = 2 cos2z – 1


and sin 2z = 2 sin z cos z







Let hence differentiating with respect to z


we get


hence



log t + c = x


Resubstituting t



Resubstitute z



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