KCET 2011 Math Solved Paper

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Question : 59 of 60

Marks: +1, -0

If y=Sin‌x⋅Sin‌2‌x⋅Sin‌3‌x ⋅Sin‌n‌x, then y′ is ......................

n
∑
k=1
k‌Tan‌k‌x
y⋅
n
∑
k=1
k‌Cot‌k‌x
y⋅
n
∑
k=1
k‌Tan‌k‌n
n
∑
k=1
Cot‌k‌x

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