UPSC NDA Math Model Paper 1

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Question : 84 of 120

Marks: +1, -0

If x=a‌sin‌p‌t and y=b‌cos‌p‌t, then the value of

d2y

dx2

at t=0 :

−
b
a2
−
a
b2
a
b2
b
a2

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