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  2. Tangent - Wikipedia

    en.wikipedia.org/wiki/Tangent

    This leads to the definition of the slope of the tangent line to the graph as the limit of the difference quotients for the function f. This limit is the derivative of the function f at x = a, denoted f ′(a). Using derivatives, the equation of the tangent line can be stated as follows: = + ′ ().

  3. Tangent lines to circles - Wikipedia

    en.wikipedia.org/wiki/Tangent_lines_to_circles

    k = 1 is the tangent line to the right of the circles looking from c 1 to c 2. k = −1 is the tangent line to the right of the circles looking from c 2 to c 1. The above assumes each circle has positive radius. If r 1 is positive and r 2 negative then c 1 will lie to the left of each line and c 2 to the right, and the two tangent lines will ...

  4. Slope - Wikipedia

    en.wikipedia.org/wiki/Slope

    Slope illustrated for y = (3/2)x − 1.Click on to enlarge Slope of a line in coordinates system, from f(x) = −12x + 2 to f(x) = 12x + 2. The slope of a line in the plane containing the x and y axes is generally represented by the letter m, [5] and is defined as the change in the y coordinate divided by the corresponding change in the x coordinate, between two distinct points on the line.

  5. Differential calculus - Wikipedia

    en.wikipedia.org/wiki/Differential_calculus

    The orange line is tangent to =, meaning at that exact point, the slope of the curve and the straight line are the same. The derivative at different points of a differentiable function The derivative of f ( x ) {\displaystyle f(x)} at the point x = a {\displaystyle x=a} is the slope of the tangent to ( a , f ( a ) ) {\displaystyle (a,f(a))} . [ 3 ]

  6. Linear function (calculus) - Wikipedia

    en.wikipedia.org/wiki/Linear_function_(calculus)

    The slope of a nonvertical line is a number that measures how steeply the line is ... The graph of the linear approximation is the tangent line of the graph = () ...

  7. Derivative - Wikipedia

    en.wikipedia.org/wiki/Derivative

    The slope of the tangent line is equal to the derivative of the function at the marked point. The derivative at different points of a differentiable function. In this case, the derivative is equal to sin ⁡ ( x 2 ) + 2 x 2 cos ⁡ ( x 2 ) {\displaystyle \sin \left(x^{2}\right)+2x^{2}\cos \left(x^{2}\right)} .

  8. Implicit curve - Wikipedia

    en.wikipedia.org/wiki/Implicit_curve

    A curve point (,) is regular if the first partial derivatives (,) and (,) are not both equal to 0.. The equation of the tangent line at a regular point (,) is (,) + (,) =,so the slope of the tangent line, and hence the slope of the curve at that point, is

  9. Grade (slope) - Wikipedia

    en.wikipedia.org/wiki/Grade_(slope)

    l = slope length α = angle of inclination. The grade (US) or gradient (UK) (also called stepth, slope, incline, mainfall, pitch or rise) of a physical feature, landform or constructed line is either the elevation angle of that surface to the horizontal or its tangent. It is a special case of the slope, where zero indicates horizontality. A ...