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UPSC NDA I and II 2020 Math Solved Paper

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Question : 39 of 120
 
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A and B are positive acute angles such that cos‌2‌B=3sin2A and 3‌sin‌2‌A=2‌sin‌2‌B. What is the value of (A+2B)?
[NDA-I 2020]
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