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Olaf Trygvesson
Olaf Trygvesson asked in Science & MathematicsMathematics · 10 years ago

Simple trig intercept problem.?

Solve 4sin(3tpi)=0 for t if 0 < t < .6666666667

Thanks all!

2 Answers

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  • Zonic the hedgehog
    Lv 7
    10 years ago
    Favourite answer

    We know : .6666666667 = 2/3

    4sin( 3tπ ) = 0

    <=> sin( 3tπ ) = 0

    <=> 3tπ = kπ ( k ∈ ℤ )

    <=> 3t = k

    We have :

    0 < t < 2/3

    <=> 0 < 3t < 2

    <=> 0 < k < 2 ( We have k = 3t )

    => k = 1

    Answer : k = 1

    Source(s): I'm a Vietnamese student
  • Tim Bashme
    10 years ago

    t = 1/3

    0 = 4sin(3 * 1/3 pi)

    0 = 4sin(pi)

    0 = 4 * 0

    0 = 0

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