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To help explain we will use the following example: Show that cos(2x) = 2cos²x - 1. Hence solve the equation cos(2x) + cosx = 0 for 0^o < x < 360^o. Answer: We know fro...

Food aid is often donated by richer countries and is used in emergency situations but also to help solve long-term hunger. However, this type of aid comes with many disadvantages as often the type of food...

Stem cells are undifferentiated cells that retain the ability to specialize. In animals/ mammals, they are found in the embryos and adult tissue and in plants they are found in the meristematic tissue in ...

This is an example of a typical GCSE question, or alternatively could appear as a 'prompt' to a source question on an A level paper. In any answer, it is important to consider both sides of the argument, ...

First: Start with a comparison with English (different tenses for the present in English vs. A single one in German)

Second: Evoke the difference between strong and weak verbs in German, do a paral...