UPSC NDA I 2019 Mathematics Solved Paper

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Question : 55 of 120

Marks: +1, -0

If sin‌−1

2p

1+p2

− cos‌−1

1−q2

1+q2

= tan‌−1

2x

1−x2

, then what is x equal to?

[NDA I 2019]

p+q
1+pq
p−q
1+pq
pq
1+pq
p+q
1−pq

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