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UPSC NDA I and II 2020 Math Solved Paper

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DIRECTIONS (Qs. 16-18) : Read the following information and answer the three items that follow:
Let asin2x+bcos2x=c;bsin2y+acos2y=d and p‌tan‌x=q‌tan‌y.

[NDA-I 2020]

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Question : 16

Total: 120

What is tan2x equal to ?

c−b
a−c
a−c
c−b
c−a
c−b
c−b
c−a

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