UPSC NDA Math Model Paper 1

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Question : 77 of 120

Marks: +1, -0

If f(x)=|cos‌x−sin‌x|, then f′(

π

6

) is equal to:

−
1
2
(1+√3)
1
2
(1+√3)
−
1
2
(1−√3)
1
2
(1−√3)

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