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anonymous

  • one year ago

Find the point on the terminal side of θ = negative three pi divided by four that has an x coordinate of -1. Show your work for full credit.

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  1. anonymous
    • one year ago
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    do you know which quadrant this is in?

  2. anonymous
    • one year ago
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    no maybe the 3rd?

  3. anonymous
    • one year ago
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    2nd. pull up this unit circle http://www.regentsprep.org/regents/math/algtrig/att5/600px-Unit_circle_angles_svg.jpg

  4. anonymous
    • one year ago
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    i know what the unit circle is but how did you know it was in the 2nd quadrant

  5. anonymous
    • one year ago
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    look at the angle measurements. 3π/4 is in the second quadrant (135°)

  6. anonymous
    • one year ago
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    but its negative

  7. anonymous
    • one year ago
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    it is in 3rd

  8. anonymous
    • one year ago
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    oh I missed that :( sorry. It is in the 3rd then

  9. anonymous
    • one year ago
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    -3π/4 is the same as 5π/4

  10. anonymous
    • one year ago
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    y=x tan(θ )

  11. anonymous
    • one year ago
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    thats how you find the terminal side?

  12. anonymous
    • one year ago
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    x=-1 the point is (-1,y)

  13. anonymous
    • one year ago
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    so to find y i just use that equation?

  14. anonymous
    • one year ago
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    yes. The terminal side is basically the angle. And you can use that formula to find y

  15. anonymous
    • one year ago
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    okay thank you so much

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