Respuesta :

nobillionaireNobley
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.

Answer:

3pi

Step-by-step explanation:

on a pex

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