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iiamentertainment

  • one year ago

Trig.

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  1. iiamentertainment
    • one year ago
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    http://gyazo.com/71d265ab6b393078a918dc07d5f49c7b

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

  3. myininaya
    • one year ago
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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

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

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

  6. myininaya
    • one year ago
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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.

  7. iiamentertainment
    • one year ago
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    well then im confused

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

  9. myininaya
    • one year ago
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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.

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

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

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

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

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

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

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

  17. myininaya
    • one year ago
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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.

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

  19. myininaya
    • one year ago
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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)

  20. myininaya
    • one year ago
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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

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