KEAM 2014 Math Paper

© examsiri.com

Question : 97 of 120

Marks: +1, -0

If ab<1 and

cos−1(

1−a2

1+a2

)+cos−1(

1−b2

1+b2

)=2tan−1x,

then x is equal to

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

Go to Question:

Prev Question

Next Question