UPSC NDA I 2010 Mathematics Paper

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Question : 118 of 120

Marks: +1, -0

If cos‌x≠−1, then what is ‌

sin‌x

1+cos‌x

equal to?

−cot‌
x
2
cot‌
x
2
tan‌
x
2
−tan‌
x
2

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