UPSEE 2017 Solved Paper

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Question : 130 of 150

Marks: +1, -0

For what interval of variation of x, th identity arc‌cos‌

1−x2

1+x2

=−2‌arc‌tan‌x is true?

−∞<x≤0
1<x<∞
0≤x≤1
0≤x<∞

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