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November 23rd, 2013, 08:56 AM   #1
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dy/dx and theta angle

If dy/dx = tan(?), is possible to relate dy/dx with some function of theta too?
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November 23rd, 2013, 10:02 AM   #2
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Re: dy/dx and theta angle

You aren't saying exactly what you mean! If, as I suspect, "theta" is the angle the tangent to y= f(x) makes with the x-axis, so that "dy/dx= tan(theta)" is one definition of the derivative, then NO, the second derivative cannot depend on theta. We can, in fact, take any value for both first and second derivatives at any one value of x.
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