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anonymous

  • one year ago

Trig help pls

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  1. anonymous
    • one year ago
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    If cosine of x equals 1 over 2, what is sin(x) and tan(x)

  2. welshfella
    • one year ago
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    |dw:1438375749215:dw|

  3. welshfella
    • one year ago
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    is you find what the value of y is using the pythagoras theorem then yo'll have your answers

  4. welshfella
    • one year ago
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    as you see cos x = adj / hyp = 1/2

  5. anonymous
    • one year ago
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    I think I can get it from here, I will do it and then I want you to check my work

  6. welshfella
    • one year ago
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    yea ok

  7. anonymous
    • one year ago
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    can the y be negative?

  8. welshfella
    • one year ago
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    oh no y^2 = 2^2 - 1^2

  9. anonymous
    • one year ago
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    right, silly me

  10. anonymous
    • one year ago
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    y = sqrt(5) im here so far, now i use SohCahToa

  11. welshfella
    • one year ago
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    no y^2 = 2^2 - 1^2 = 4 - 1 = 3

  12. anonymous
    • one year ago
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    oh god, where's my head......i lost it xD

  13. welshfella
    • one year ago
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    applying pythagoras 2^2 = 1^1 + y^2 y^2 = 2^2 - 1^1

  14. welshfella
    • one year ago
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    lol so now you only have to apply SOHCAHTOA to get the sine and tangent

  15. welshfella
    • one year ago
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    |dw:1438376420375:dw|

  16. anonymous
    • one year ago
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    sin = sqrt(3)/2 tan = sqrt(3)/1

  17. welshfella
    • one year ago
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    right that triangle is worth remembering as it comes in useful for a lot of trig questions in fact there are 2 worth knowing

  18. welshfella
    • one year ago
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    |dw:1438376617866:dw|

  19. welshfella
    • one year ago
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    |dw:1438376648938:dw|

  20. anonymous
    • one year ago
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    thank you

  21. welshfella
    • one year ago
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    yw

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