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Different revision techniques work for different people, but I find that employing a variety of different methods is often the best way to ensure that the most information information is retained. When st...

The basic expectation of any examiner when marking a source-based question is whether you have identified the value of the source to an historian with reference to the relevant historical context...

These are all types of long-term memory. Episodic memory is our memory store for personal events, it is our ability to recall memories from our daily lives. It is like a diary, memories are time stamped a...

To solve this question we want to find the range of values that x can be to make the statement true. First we must treat it like a normal quadratic equation and move all ...

Note that |sin(x)| <= 1 for all real x, so our solution must be complex if one exists at all
Euler's formula gives that exp(ix) = cos(x) + isin(x), and hence exp(-ix) = cos(x) - isin(x) since cos ...