Mohon dibantu yaaahhh

Tan x positif di kuadran 1 (x) dan kuadran 3 (180° + x)
Tan x = Tan (180° + x)

Lim (x + π/2) (1 - sin x) / tan 2x
x=>-π/2

Lim (x + π/2) (1 - sin x) / tan (π + 2x)
x=>-π/2

Lim (1 - sin x) (x + π/2)/(tan 2(x + π/2))
x=>-π/2

= (1 - sin (-π/2)) . 1/2

= (1 - (-1)) . 1/2

= 2 . 1/2

= 1