COMEDK Exam 2012 Solved Paper

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Question : 135 of 180
 
Marks: +1, -0
If sin‌−1(‌
2p
1+p2
)
−cos−1(‌
1−q2
1+q2
)

=tan−1(‌
2x
1+x2
)
, then the value of x is equal to
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