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UPSC NDA II 2024 Mathematics Paper

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Question Numbers: 85-86
Direction : Consider the following for the items that follow :
Let f(x) = cos2x + x on [-Ï€/2, Ï€/2]. 
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Question : 86 of 120
 
Marks: +1, -0
What is the least value of f(x)? 
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