Let a and ß be two real numbers. if tan 2x2 sin ax lim- lim- -0 x(1- cos 2x) then a +b equals (a) (b) 1 (c) (d)

Let a and ß be two real numbers. If tan 2x2 sin ax lim- lim- -0 x(1- cos 2x) then a +B equals (A) (B) 1 (C) (D) share with details stepwise solution