Q21 of 23 Page 2

Prove that

OR


Solve the equation for x :


[CBSE 2016]

Given:


Re - writing the given equation in the form of tan – 1, we get,




Formula:




Formula:



Hence, proved.


OR


Given:


Re - writing the given equation as,


Taking, tan-1x = m…..(1)


tan m = x


Now, drawing the right-angled triangle for this condition we get,



Formula:



Therefore,



And thus,


m


Therefore, we get,






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