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प्रश्न
Choose the correct options from the given alternatives :
`2 int (cos^2x - sin^2x)/(cos^2x + sin^2x)*dx` =
पर्याय
sin 2x + c
cos 2x + c
tan 2x + c
2 sin 2x + c
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उत्तर
sin 2x + c
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