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Prepositions affect the case of the noun after them, and two-way prepositions can either put this noun into the dative or the accusative, depending on if there is movement in the sentence...

Say you have a differential equation of the form:
dy/dx + Py = Q , where P and Q are functions of x.
Remember that even if your equation doesn't initially look like this, you may be able to rea...

We can't integrate cos^2(x) as it is, so we want to change it into another form. We can easily do this using trig identities.

1) Recall the double angle formula:

c...

Firstly, you need to understand that there are two main types: Passive Immunity and Active Immunity. We will take them one by one and break them down now.

I have been interested in physics my whole life, when I was 12 I made my own wind turbine out of a plastic bottle (along with a few other materials!). I took both GCSE and A level physics and just fini...