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The integral ∫ π − + 0 2 dx 2 x sin 4 2 x sin 4 1 equals :

1. 4 3 – 4 – 3 π
2. π – 4
3. 3 2 π – 4 – 4 3
4. 4 3 – 4

Correct answer: 4 3 – 4 – 3 π

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