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Integration by Substitution

Solve I=∫ si...

Question

Solve
$I = \int (sin 3 x + cos 4 x) d x$

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Solution

Now,
$I = \int (sin 3 x + cos 4 x) d x$
or, $I = - \frac{cos 3 x}{3} + \frac{sin 4 x}{4} + c$ [ Where $c$ is integrating constant].

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