1.
If α=2tan1(1+x1x)\alpha = 2\tan^{-1}\left(\dfrac{1+x}{1-x}\right) and β=sin1(1x21+x2)\beta = \sin^{-1}\left(\dfrac{1-x^2}{1+x^2}\right), what is the value of α+β\alpha + \beta if x>1x > 1?