Respuesta :
cot x/2 = -1
1/tan x/2 = -1
tan x/2 = -1
x/2 = arctan(-1) = 3pi/4
x = 2(3pi/4) = 3pi/2
x = 3pi/2
option a is the correct answer.
1/tan x/2 = -1
tan x/2 = -1
x/2 = arctan(-1) = 3pi/4
x = 2(3pi/4) = 3pi/2
x = 3pi/2
option a is the correct answer.