UPSC NDA I 2012 Mathematics Paper
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For the next Three (3) questions that follow:
Lets i n ( A + B ) = 1 s i n ( A − B ) = 1 ∕ 2 A , B ∈ [ 0 ,
]
Let
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Question : 27 of 120
Marks:
+1,
-0
What is s i n 2 A − s i n 2 B
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