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Small angle approx

approximations to sin(x), cos(x)

New statistics materials

I'm currently on a big statistics drive - adding notes on the Poisson, Normal and t-distributions.

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Early days

We're massively overhauling the site!

New content

I've just added some materials covering the expected value of a discrete random variable.

The first news article

This is the first news article on the site. It doesn't tell us all that much, just gives a bit of text and commentary to play with and an image.

Random Reddit Question Part 2

Part 2 was to calculate the second derivative - the tricky aspect was evaluation of $\frac{dt}{dx}$

Random Reddit Questions

The reddit question was, given that

$$x = t + \ln(\cosh t),\; y = \sinh t$$

Show that $$\frac{dy}{dx} = e^{-t}\cosh^2(t)$$