UPSC NDA 2 2012 Mathematics Paper

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Question : 83 of 120

Marks: +1, -0

What is ∫(‌

1

cos2x

−‌

1

sin‌2x

)‌dx equal to?

2‌cosec‌2‌x+c
−2‌cot‌2‌x+c
2 sec2x+c
−2‌tan‌2‌x+c
where c is the constant of integration.

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