A-2 for a e t, 2] and n e z, the critical points of f(x) =sin a tansx + (sin a - 1) tan x * r are (a)x nt (b) x = 2nt c)x= (2n+ 1)t (d) none of these

a-2 For a e T, 2] and n e Z, the critical points of f(x) =sin a tansx + (sin a - 1) tan x * R are (A)x nT (B) x = 2nT C)x= (2n+ 1)T (D) none of these