Listen NCERT Audio Books - *Kitabein Ab Bolengi*

47

Mark the tick against the correct answer in the following:

If tan^{-1} x + tan^{-1} 3 = tan^{-1} 8 then x = ?

Given: + =

To Find: The value of x

Here + = can be written as

= -

Since we know that - =

= - =

=

=

x =

1