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The key to solving any integral of this form is to use the cosine rule: cos(2x) = cos 2 (x) - sin 2 (x) = 2 cos 2 (x) - 1 = 1 - 2 sin 2 (x) All of these forms are really helpful when solving problems such as...

This question is probably the most asked question from any English student! From personal experience the best way to revise for an English exam is to know what the exam board are looking for: For example AQA...

Before starting any research or secondary reading, it is important to establish your line of argument because this will help to direct your essay and make sure you answer the question. A good tip would be: i...

The main function of the red blood cell is transport oxygen around the body to other cells. It contains haemaglobin which allows the binding of oxygen. Its biconcave shape maximises the surface area to incre...

y=x^ x To find the differential, dy/dx, logs of both sides must be taken: log(y)=log(x^ x ) Then using log rules, the power can be brought down, outside the log expression: log(y) = x log(x) This expre ssion...