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Thread: graph transformation

  1. #1
    Junior Member
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    graph transformation

    hi,
    y=tan(\theta-45^\circ)

    graph transformation-untitled.jpg


    in solutions it states it meets y-axis at -1
    my question about this is how do i know that graph meets the y axis exactly at -1 ?
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  2. #2
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    Re: graph transformation

    at the $y$ axis $\theta = 0$

    $\tan(0-45^\circ) = \tan(-45^\circ) = -1$
    Thanks from AbYz
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  3. #3
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    Re: graph transformation

    Your two axes are the $y$-axis and the $\theta$-axis. If you want to know when the graph meets one axis, set the variable for the other axis to zero. This gives $y = \tan (-45^\circ ) = -1$.
    Thanks from AbYz
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