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

Question

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

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Hải Đăng 1 year 2021-09-04T09:55:39+00:00 2 Answers 15 views 0

Answers ( )

  1. Euphemia
    0
    2021-09-04T09:56:59+00:00
    Reply

    Answer:

    D

    Step-by-step explanation:

    What we have to do is to find the arc tan

    x/2 = arc tan (-1)

    tan is negative on the 4th and second quadrant

    arc tan (-1) = 135 or 315

    pi is 180 degrees

    so we have;

    135 is 3 pi/4

    multiplied by the 2

    = 6 pi/4 which is 3 pi/2

    315 is 7 pi/4 which is same as 7 pi/2 when we multiply by 2

  2. nguyetanh
    0
    2021-09-04T09:57:38+00:00
    Reply

    Answer:

    the answer is d

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Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )