Which value is the solution for the equation cotx/2=-1? A. 3pi/2 B. 3pi/4 C. 5pi/4 D. 7pi/4

asked Sep 25, 2017 56.6k views

1 vote

Which value is the solution for the equation cotx/2=-1?

A. 3pi/2
B. 3pi/4
C. 5pi/4
D. 7pi/4

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4 votes

Answer:

3pi

Explanation:

on a pex

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5 votes

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.

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