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1 September, 00:43

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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Answers (1)
  1. 1 September, 00:56
    0
    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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