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प्रश्न
Choose the correct alternative:
`int tan^-1 sqrt((1 - cos 2x)/(1 + cos 2x)) "d"x` is
विकल्प
x2 + c
2x2 + c
`x^2/2 + "c"`
`- x^2/2 + "c"`
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उत्तर
`x^2/2 + "c"`
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