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  2. Guillermo Cabanellas - Wikipedia

    en.wikipedia.org/wiki/Guillermo_Cabanellas

    During his stay in Paraguay, Cabanellas de Torres wrote a biography of Dr. José Gaspar Rodríguez de Francia, dictator of that country and, in Argentina, he wrote two books on the Spanish Civil War: La guerra de los mil días (The Thousand Days' War) and Cuatro generales (Four Generals), both in two volumes, considered by the author himself as ...

  3. Differentiation of trigonometric functions - Wikipedia

    en.wikipedia.org/wiki/Differentiation_of...

    For example, the derivative of the sine function is written sin ′ (a) = cos(a), meaning that the rate of change of sin(x) at a particular angle x = a is given by the cosine of that angle. All derivatives of circular trigonometric functions can be found from those of sin( x ) and cos( x ) by means of the quotient rule applied to functions such ...

  4. Miguel Cabanellas - Wikipedia

    en.wikipedia.org/wiki/Miguel_Cabanellas

    Miguel Primo de Rivera permitted him to go into the reserves in 1926, which led him to participate in a revolt frustrated in 1929. For his support of the republicans, on 17 April 1931 the provisional government of the Republic named him commander-in-chief of Andalusia .

  5. Quotient rule - Wikipedia

    en.wikipedia.org/wiki/Quotient_rule

    In calculus, the quotient rule is a method of finding the derivative of a function that is the ratio of two differentiable functions. Let () = (), where both f and g are differentiable and () The quotient rule states that the derivative of h(x) is

  6. Euler's formula - Wikipedia

    en.wikipedia.org/wiki/Euler's_formula

    The original proof is based on the Taylor series expansions of the exponential function e z (where z is a complex number) and of sin x and cos x for real numbers x . In fact, the same proof shows that Euler's formula is even valid for all complex numbers x .

  7. Cheap, pre-owned EVs are about to flood the market. Is that a ...

    www.aol.com/finance/cheap-pre-owned-evs-flood...

    The electric vehicle market could get a huge influx of cheaper cars — but not fresh from the factory. In its latest EV intelligence report, consumer research firm J.D. Power projects that a ...

  8. Notation for differentiation - Wikipedia

    en.wikipedia.org/wiki/Notation_for_differentiation

    for the nth derivative. When f is a function of several variables, it is common to use "∂", a stylized cursive lower-case d, rather than "D". As above, the subscripts denote the derivatives that are being taken. For example, the second partial derivatives of a function f(x, y) are: [6]

  9. Derivative - Wikipedia

    en.wikipedia.org/wiki/Derivative

    In mathematics, the derivative is a fundamental tool that quantifies the sensitivity of change of a function's output with respect to its input. The derivative of a function of a single variable at a chosen input value, when it exists, is the slope of the tangent line to the graph of the function at that point.