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IloveCharlie

  • 3 years ago

Please help! Having trouble with this Precalc/Trig problem :/ Click attached

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  1. IloveCharlie
    • 3 years ago
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  2. dpaInc
    • 3 years ago
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    factor it... treat it as a quadratic...

  3. eyust707
    • 3 years ago
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    Lets just change the name of tanx.. lets call z.

  4. waterineyes
    • 3 years ago
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    Factor out tan(x) first..

  5. eyust707
    • 3 years ago
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    \[z^2 - z = 0 \] can you do that one?

  6. waterineyes
    • 3 years ago
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    \[\tan(x)(\tan(x) - 1) = 0\] \[\tan(x) = 0\] And: \[\tan(x) - 1 = 0\] Now try to find x..

  7. IloveCharlie
    • 3 years ago
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    1/4?

  8. IloveCharlie
    • 3 years ago
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    ?

  9. helpingtutors
    • 3 years ago
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    x = arc tan(1) x=??

  10. IloveCharlie
    • 3 years ago
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    pi/4

  11. nickhouraney
    • 3 years ago
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    http://upload.wikimedia.org/wikipedia/commons/4/4c/Unit_circle_angles_color.svg

  12. waterineyes
    • 3 years ago
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    tan(x) = 0 Can you tell for what value of x tan(x) is 0 ??

  13. IloveCharlie
    • 3 years ago
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    :/ uhhh

  14. waterineyes
    • 3 years ago
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    huh...

  15. waterineyes
    • 3 years ago
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    tan(x) = 0 can't you find x from it?? \[x = \tan^{-1}(0)\]

  16. IloveCharlie
    • 3 years ago
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    I replied to helpingtutors, pi/4?

  17. waterineyes
    • 3 years ago
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    That is not right for this..

  18. waterineyes
    • 3 years ago
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    That is right for \(tan(x) = 1\)

  19. waterineyes
    • 3 years ago
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    Can you find the value of \(tan^{-1}(0)\) ??

  20. IloveCharlie
    • 3 years ago
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    0

  21. waterineyes
    • 3 years ago
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    Yes..

  22. waterineyes
    • 3 years ago
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    One value you are getting 0 and other pi/4 What could be the answer can you tell ??

  23. waterineyes
    • 3 years ago
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    By looking at the answer choices..

  24. IloveCharlie
    • 3 years ago
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    C.? Or can you reduce?

  25. nickhouraney
    • 3 years ago
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    reduce?

  26. waterineyes
    • 3 years ago
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    Are you sure with C or not ?? Tell me this thing..

  27. IloveCharlie
    • 3 years ago
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    Yes

  28. waterineyes
    • 3 years ago
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    Then you are right..

  29. nickhouraney
    • 3 years ago
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    tangent equals zero in two points in the unit circle

  30. IloveCharlie
    • 3 years ago
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    C. Thank you all for your help :) I appreciate it very much

  31. waterineyes
    • 3 years ago
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    Wait..

  32. IloveCharlie
    • 3 years ago
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    :/

  33. waterineyes
    • 3 years ago
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    Go with @nickhouraney

  34. IloveCharlie
    • 3 years ago
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    So not c.?

  35. waterineyes
    • 3 years ago
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    No.. My mistake there...

  36. nickhouraney
    • 3 years ago
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    whats points in the unit circle will tangent equal zero

  37. nickhouraney
    • 3 years ago
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    if you answer this ^ you will have your answer

  38. waterineyes
    • 3 years ago
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    Basically : \(tan(x) = 0\) \[\implies x = n \pi, n \in \mathbb{Z}\]

  39. waterineyes
    • 3 years ago
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    n is integer here.. Put n = 0 and 1 to find your answer..

  40. IloveCharlie
    • 3 years ago
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    b.?

  41. waterineyes
    • 3 years ago
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    Yep..

  42. IloveCharlie
    • 3 years ago
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    Ahhhh I see. Thanks guys

  43. waterineyes
    • 3 years ago
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    Welcome dear..

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