UPSC NDA I 2013 Mathematics Paper

© examsiri.com

Question : 73 of 120

Marks: +1, -0

If sin−1(‌

2a

1+a2

)+sin−1(‌

2b

1+b2

)=2tan−1x, then x is equal to

‌
a−b
1+ab
‌
a−b
1−ab
‌
2ab
a+b
‌
a+b
1−ab

Go to Question:

Prev Question

Next Question