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anonymous

  • one year ago

Using the graph of y=sin(x), find the values of the interval [-4(pi), (pi)/2] that satisfy the ordered pair (x, 1/2).

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  1. anonymous
    • one year ago
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    @Hero @ganeshie8

  2. anonymous
    • one year ago
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    \[is the interval (-4\pi,\pi/2)\]

  3. anonymous
    • one year ago
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    yes

  4. anonymous
    • one year ago
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    Do you have a unit circle ? it is just asking for what values of x is sin 1/2 sin(x)=1/2

  5. jdoe0001
    • one year ago
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    \(\bf y=sin(x)\qquad \begin{array}{llll} (x&\frac{1}{2})\\ \uparrow&\uparrow \\ x&y \end{array}\implies \frac{1}{2}=sin(x) \\ \quad \\ sin^{-1}\left( \cfrac{1}{2} \right)=sin^{-1}[sin(x)]\implies sin^{-1}\left( \cfrac{1}{2} \right)=x\)

  6. jdoe0001
    • one year ago
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    so, find that angle, and any other angle with the same value in the range of \(\left[ -4\pi ,\frac{\pi }{2} \right]\)

  7. anonymous
    • one year ago
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    so what are all the values that satisfy (x,1/2)

  8. jdoe0001
    • one year ago
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    well, as Deeezzzz pointed out, use your Unit Circle

  9. jdoe0001
    • one year ago
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    http://www.shelovesmath.com/wp-content/uploads/2012/11/Unit-Circle1.png <--- there's a unit circle and check the coterminal angles on that given range

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