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babydoll332

  • 2 years ago

Find the exact value of cot-1(1). please step by step :)

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  1. Brittni0605
    • 2 years ago
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    what is cot using sin and cos?

  2. babydoll332
    • 2 years ago
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    wait wat? explain... please

  3. Brittni0605
    • 2 years ago
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    Do you know what cot means?

  4. babydoll332
    • 2 years ago
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    cotangent

  5. Brittni0605
    • 2 years ago
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    Yes, but what is cotangent?

  6. babydoll332
    • 2 years ago
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    sin/tan

  7. babydoll332
    • 2 years ago
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    cos/sin

  8. Brittni0605
    • 2 years ago
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    Its cos/sin

  9. Brittni0605
    • 2 years ago
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    |dw:1352671301171:dw|

  10. babydoll332
    • 2 years ago
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    idk wat to do next...

  11. Brittni0605
    • 2 years ago
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    |dw:1352671590676:dw|

  12. babydoll332
    • 2 years ago
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    pi

  13. Brittni0605
    • 2 years ago
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    No.

  14. Brittni0605
    • 2 years ago
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    |dw:1352671674439:dw|

  15. babydoll332
    • 2 years ago
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    pi/2

  16. Brittni0605
    • 2 years ago
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    No, what is cos in general?

  17. zordoloom
    • 2 years ago
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    Do you still need help with this?

  18. babydoll332
    • 2 years ago
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    yess

  19. Brittni0605
    • 2 years ago
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    cos is x sin is y

  20. babydoll332
    • 2 years ago
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    wow ok im sorry u have to do the basic with me

  21. Brittni0605
    • 2 years ago
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    |dw:1352671946433:dw|

  22. babydoll332
    • 2 years ago
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    ok

  23. babydoll332
    • 2 years ago
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    i understood that

  24. Brittni0605
    • 2 years ago
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    OK, good.

  25. zordoloom
    • 2 years ago
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    Allright, So you are given cot^-1(1) The cot^(-1) means to find the angle where cot is 1 Cot is also (cos/sin) So if you look at the unit circle, where does cos equal 1? So cos is 2pi at 1 and sine is pi/2 at 1 If you put 2pi/pi/2 you get pi/4 So cos^-1(1) is pi/4

  26. Brittni0605
    • 2 years ago
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    You can follow @zordoloom, but im not sure what he's doing. So your choice.

  27. babydoll332
    • 2 years ago
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    how would i get 2pi/pi=4pi

  28. Brittni0605
    • 2 years ago
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    It doesnt equal 4pi. That would equal 2

  29. babydoll332
    • 2 years ago
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    If you put 2pi/pi/2 you get pi/4

  30. Brittni0605
    • 2 years ago
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    No, you get 1.

  31. babydoll332
    • 2 years ago
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    and where do i find 1 on the unit circle

  32. Brittni0605
    • 2 years ago
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    |dw:1352672476549:dw|

  33. babydoll332
    • 2 years ago
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    i know its 45degree but idk how?

  34. Brittni0605
    • 2 years ago
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    gimme a sec

  35. babydoll332
    • 2 years ago
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    like idk how how cos 1 = pi/4 i get how to get it but not how u get thru the unit circle

  36. Brittni0605
    • 2 years ago
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    what are the coordinates of pi/4 on the unit circle?

  37. babydoll332
    • 2 years ago
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    no how he got this

  38. babydoll332
    • 2 years ago
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    So if you look at the unit circle, where does cos equal 1? So cos is 2pi at 1 and sine is pi/2 at 1

  39. Brittni0605
    • 2 years ago
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    cos equals one at 0 and 2pi

  40. babydoll332
    • 2 years ago
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    then somehow he got 4/p

  41. Brittni0605
    • 2 years ago
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    dont write anything, just read what i write

  42. babydoll332
    • 2 years ago
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    okkkk

  43. Brittni0605
    • 2 years ago
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    |dw:1352672770099:dw|

  44. babydoll332
    • 2 years ago
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    sin=1 at pi/2

  45. Brittni0605
    • 2 years ago
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    Shhh..dont write.

  46. Brittni0605
    • 2 years ago
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    |dw:1352672843682:dw|

  47. Brittni0605
    • 2 years ago
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    |dw:1352672885447:dw|

  48. Brittni0605
    • 2 years ago
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    |dw:1352672912951:dw|

  49. babydoll332
    • 2 years ago
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    ohhhhh

  50. babydoll332
    • 2 years ago
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    ok i get it

  51. Brittni0605
    • 2 years ago
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    Ok, r u sure?

  52. babydoll332
    • 2 years ago
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    god ur amazing i would have been here for a few hours

  53. babydoll332
    • 2 years ago
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    yes i ddint multiply them

  54. Brittni0605
    • 2 years ago
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    thanks, do you want me to give another example..so u can see if u get it right?

  55. babydoll332
    • 2 years ago
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    um ya an easy 1 please

  56. Brittni0605
    • 2 years ago
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    OK, gimme a sec

  57. Brittni0605
    • 2 years ago
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    \[ \cot^{-1} (-1)=?\]

  58. babydoll332
    • 2 years ago
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    pi

  59. Brittni0605
    • 2 years ago
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    No.

  60. babydoll332
    • 2 years ago
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    3pi/4

  61. Brittni0605
    • 2 years ago
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    Yes!

  62. babydoll332
    • 2 years ago
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    question is cot always on the 3rd quadrant?

  63. Brittni0605
    • 2 years ago
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    No, the original question you asked, the answer was pi/4 (thats in the 1st quadrant)

  64. babydoll332
    • 2 years ago
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    but thats for cos

  65. babydoll332
    • 2 years ago
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    not cot

  66. babydoll332
    • 2 years ago
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    cos=1st cot=3rd

  67. Brittni0605
    • 2 years ago
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    No, all quadrants apply for any trig identity.

  68. babydoll332
    • 2 years ago
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    oh i know but for those mostly

  69. Brittni0605
    • 2 years ago
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    The answer is still no.

  70. babydoll332
    • 2 years ago
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    ok thanks :)

  71. Brittni0605
    • 2 years ago
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    Np.

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