JEE Advanced 2020 Concept Recapitulation Test 4 Paper 1

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Question : 45 of 54
 
Marks: +1, -0
If |
n
∑
r=1
a
,sin(rx)
|
≤
|sin‌x
|∀x∈R
for real numbers a1a2....an, then |
n
∑
r=1
ra
,
|
can be equal to
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