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Austin Riley
Austin Riley asked in Education & ReferenceHomework Help · 3 years ago

Math Homework Help Me ASAP Please!?

Give the answer as a multiple of π. Do not use decimal numbers. The answer should be a fraction or an integer. Note that π is already included in the answer so you just have to enter the appropriate multiple. E.g. if the answer is π/2 you should enter 1/2. If there is more than one answer enter them separated by commas.

See attached photo can you show the work on how this done I keep getting it wrong!!

thanks! its due tonight i need help as soon as possible!!

Attachment image

2 Answers

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  • hayharbr
    Lv 7
    3 years ago

    You probably should just memorize these ones that come out exact; sin 7/6 π and sin 11/6 π = - 1/2, and

    sin 4/3 π and sin 5/3 π= -√3 / 2

  • Michael
    Lv 7
    3 years ago

    sin(t) = -√3 / 2

    Reference angle 60º = (1/3)π

    Sin is negative in Quadrants III and IV

    QIII = π + (1/3)π = (4/3)π

    QIV = 2π - (1/3)π = (5/3)π

    t = 4/3, 5/3 <–––––

    sin(t) = -1/2

    Reference angle 30º = (1/6)π

    Sin is negative in Quadrants III and IV

    QIII = π + (1/6)π = (7/6)π

    QIV = 2π - (1/6)π = (11/6)π

    t = 7/6, 11/6 <––––––

    http://goo.gl/y49sTR

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