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Math Help - finding derivative

  1. #1
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    finding derivative

    If y=tanx how is dx/dt= 2? I dont understand where the 2 came from.
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  2. #2
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    Re: finding derivative

    I think i see now. If something changes 2 units per time unit?
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  3. #3
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    Re: finding derivative

    Quote Originally Posted by droidus View Post
    If y=tanx how is dx/dt= 2? I dont understand where the 2 came from.
    I don't either (unless it was a given condition). Is there more to this problem that you've not mentioned?

    note ...

    \frac{dy}{dt} = \sec^2{x} \cdot \frac{dx}{dt}
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  4. #4
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    Re: finding derivative

    You give y as a function of x but ask for the derivative of x with respect to t. There must be some other information, such as giving x as a function of t, that you did not post.
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