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iiamentertainment Group Title

Trig.

  • one year ago
  • one year ago

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  1. iiamentertainment Group Title
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    http://gyazo.com/71d265ab6b393078a918dc07d5f49c7b

    • one year ago
  2. myininaya Group Title
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    So -180 degrees means you are going to go a half of the circle clockwise |dw:1379695755546:dw|

    • one year ago
  3. myininaya Group Title
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    Now tan(x)=sin(x)/cos(x) sin(x) and cos(x) are given to you in that picture for x=-180 degrees

    • one year ago
  4. iiamentertainment Group Title
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    so my answer would -1 correct

    • one year ago
  5. iiamentertainment Group Title
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    For number 2 its 4^2 + 3^2 = c^2 which equals 25 so c^2 = 5

    • one year ago
  6. myininaya Group Title
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    Well no. Because tan(-180 deg)=sin(-180 degrees)/cos(-180 degrees) You are only giving the me what cos(-180 degrees) equals.

    • one year ago
  7. iiamentertainment Group Title
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    well then im confused

    • one year ago
  8. myininaya Group Title
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    Let me show you a picture.

    • one year ago
  9. myininaya Group Title
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    |dw:1379696063163:dw| cos(theta)=adj/hyp=x/1=x So the x coordinate is cos(theta) sin(theta)=opp/hyp=y/1=y So the y coordinate is sin(theta) tan(theta)=opp/adj=y/x Your coordinates are given to you when you do that -180 degree rotation.

    • one year ago
  10. myininaya Group Title
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    Just put them in place of y and x.

    • one year ago
  11. myininaya Group Title
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    |dw:1379696195859:dw|

    • one year ago
  12. myininaya Group Title
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    tan(-180 deg)=?

    • one year ago
  13. iiamentertainment Group Title
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    (-1,0)

    • one year ago
  14. myininaya Group Title
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    well plug those numbers remember tan(theta)=y/x

    • one year ago
  15. iiamentertainment Group Title
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    im sorry im so lost

    • one year ago
  16. myininaya Group Title
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    what is y and what is x?

    • one year ago
  17. myininaya Group Title
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    Remember your coordinates are (x,y) which means that x is -1 and y is 0. Just replace your x with -1 and replace your y with 0.

    • one year ago
  18. myininaya Group Title
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    \[\tan(-180^o) =\frac{\text{the y coordinate after rotating} -180^o}{\text{ the x coordinate after rotating} -180^o}\]

    • one year ago
  19. myininaya Group Title
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    Replace that y coordinate with 0 Replace the x coordinate with -1 You know to do this since tan(theta)=y/x and your coordinate is (-1,0)

    • one year ago
  20. myininaya Group Title
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    So you should be able to do the last one. I will give you a hint use the same formula from above tan(theta)=y/x

    • one year ago
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