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Integrate : int e^(-2x) sin 3x sin 4x dx...

Integrate : `int e^(-2x) sin 3x sin 4x dx`

Text Solution

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The correct Answer is:
`=(e^(-2x))/(2sqrt(5))cos(x+tan^(-1)(1)/(2))-(e^(-2x))/(2sqrt(53))cos(7x+tan^(-1)(7)/(2))+c`.
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