AP and TS EAMCET Engineering Model Paper 8

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Question : 21 of 160

Marks: +1, -0

The solution of

sin−1

2a

1+a2

−cos−1

1−b2

1+b2

=tan−1

2x

1−x2

is

a+b
1−ab
a−b
1+ab
ab−1
a+b
ab+1
a−b

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