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In history essays you need to show that you understand the question you are being asked and that you can illustrate several different interpretations, backing each with evidence. An introduction is needed...

Begin with a diagram of the system, and definition of directions. Vertically up and clockwise rotations are positive. It must be recalled that in SHM force is proportional to displacement from equqilibriu...

The derivative can be found by using the chain rule. i.e. let g(x) = |sin(x)|, so f(x)=ln(g(x)), hence df/dx = df/dg * dg/dx

df/dg = 1/g, dg/dx = |cos(x)| so df/dx = |cos(x)|/|sin(x)|

For th...

In the same way the context in which a text is written influences the author's final product, the historical period in which that text is interpreted greatly shifts our perception of its themes and messag...

El préterito perfecto es el equivalente del past perfect, que utiliza el verbo auxiliar haber + el participio del verbo principal como en inglés have + past participle. Por ejemplo, yo he comido,...