Question

Solve over the set of real numbers:

(sinx + 1)(tanx - 1) = 0

Answer 1

Just get the 2 solutions/ principal solutions by

sin x + 1 = 0

AND

tan x -1 = 0

Answer 2

so, sin x = -1 find x
and tan x = 1 find x too..

Answer 3

sin x = negative (it will be in quadrant 3 or 4)
tan x = positive (it will be in quadrant 1 or 3)