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