UPSC NDA I 2013 Mathematics Paper

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Question : 13 of 120

Marks: +1, -0

If y=sin(ax+b), then what is ‌

d2y

dx2

at x=−‌

b

a

, where a,b are constants and a≠0 ?

0
−1
sin(a−b)
sin(a+b)

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