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21 August, 07:36

Which expression is equivalent to sin 7pi/6

A.) sin pi/6

B.) sin 5pi/6

C.) sin 5pi/3

D.) sin 11pi/6

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Answers (1)
  1. 21 August, 07:57
    0
    B because it'd be like

    (6pi+pi) / 6=

    (6pi/6=pi) + pi/6=2pi/6=pi/3

    ...

    pi=180

    180/3=60

    5*180/60=150

    sin 150 = sin 60
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