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Math Help - I'm trying to write an equation of a tangent functio based on a graph

  1. #1
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    I'm trying to write an equation of a tangent functio based on a graph

    I'm doing pre calculus on Khan academy and I am just stuck. They want me to write a tangent function based on a graph. They show how to make a graph from a function but not the other way around.

    Please help meI'm trying to write an equation of a tangent functio based on a graph-writing-equation-tangent-line.jpg
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  2. #2
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    Re: I'm trying to write an equation of a tangent functio based on a graph

    It is always important to look at a view critical values.

    what happens to our function when x = 0 ?
    what happens when y = 0
    what happens to the tangent curve at pi/4 or pi/2

    this should help you on your way.
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  3. #3
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    Re: I'm trying to write an equation of a tangent functio based on a graph

    so the answer is f(x) = -tan(2x) + 1 but try and do all the working out
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  4. #4
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    Re: I'm trying to write an equation of a tangent functio based on a graph

    Ok but what about this one where the period doesn't begin at the y axiz
    Attached Thumbnails Attached Thumbnails I'm trying to write an equation of a tangent functio based on a graph-writing-trig-function-2.jpg  
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  5. #5
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    Re: I'm trying to write an equation of a tangent functio based on a graph

    again you have to look at some critical points,

    the function f(x) is of the form f(x) = Asin(bx) + C

    so what happens when x = 0 ?
    what about when f(x) = 0
    x = sin(pi/2) ?
    x = sin(pi/6) ?

    you need to show some working yourself
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