Math: trigonometry, help?

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  • 4 months ago
    Favorite Answer

    use the law of sine

    ...a............b

    ------- = ---------

    sin(A).....sin(B)

    ..10...........8

    ------- =  --------

    sin(A).......3/4

    10(3/4) = 8sin(A)

    15/2 = 8sin(A)

    sin(A) = 15/16 Answer//

    Answer is c. 15/16

  • 4 months ago

    By the sine rule,

    sinA/10=sinB/8

    =>

    sinA=10(3/4)/8

    =>

    sinA=15/16~0.9375

    (C)

  • Anonymous
    4 months ago

    If you’re black it’d be Nigonometry

  • 4 months ago

    sinA / a =  sinB / b

    sinA = ( a / b ) sinB

    sinA = ( 10 / 8 )( 3 / 4 ) sinA = 15/16

    —————> answer c:

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  • (1/2) * a * c * sin(B) = (1/2) * b * c * sin(A)

    a * sin(B) = b * sin(A)

    (a/b) * sin(B) = sin(A)

    (10/8) * (3/4) = sin(A)

    (5/4) * (3/4) = sin(A)

    15/16 = sin(A)

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