AP EAMCET Engineering 18 Sep 2020 Shift 2 Paper

Section: Mathematics

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Question : 23 of 160

Marks: +1, -0

If

Tanh−1(x+iy)=Tan−1(

2x

1+x2+y2

)+

i

2

Tan−1(

2y

1−x2−y2

),

where x,y∊R then Tanh−1(iy)=

i Tanh−1(y)
−i Tanh−1(y)
i Tan−1(y)
−i Tan−1(y)

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