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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...

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...

This is an quilibirum law tthat can be aplied to closed systems at dynamic equilibirum. Closed means that nothing can enter, nor leave the chemical system and dynamic equilibrium means that the rate of the f...