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If cosine is equal to -12/13 Find sine and tangent in Quadrant

  1. Feb 27, 2008 #1
    If cosine is equal to -12/13.... Find sine and tangent in Quadrant

    If cosine is equal to -12/13.... Find sine and tangent in Quadrant Two.... What is the answer??
     
  2. jcsd
  3. Feb 27, 2008 #2
    Draw a diagram.

    cosine = adjacent/hypotenuse = x/r
    sine = y/r
    tangent = y/x
    x^2 + y^2 = r^2

    Quadrant two means sine>0, and tangent<0.

    That should be enough info to solve the problem.
     
  4. Feb 28, 2008 #3
    .... ok, thanks. but what is ^??
     
  5. Feb 28, 2008 #4
    ^^.... is it "raised to the power of"?
     
  6. Feb 28, 2008 #5

    HallsofIvy

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    Staff Emeritus
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    On this and many math boards, if you are just using regular letters, "^" means to the power: 2^3= 8.

    Of course, here, you can also use html codes: 2[ sup ]3[ / sup ]= 8, without the spaces, gives 23= 8. Or you can use LaTex: [ tex ]2^3= 8[ /tex ], again without the spaces, gives [tex]2^3= 8[/tex]. You can see the code used for any LaTex by clicking on it. Also, there is a tutorial for LaTex in the "Homework and Coursework" section.
     
  7. Feb 28, 2008 #6
    ....
    i see.. thanks for the info.

    "Euclid alone has looked on beauty bare"

    ^^
     
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