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In simple terms, we need to know whether a reactant is first, second or zero order if we want to understand what effect changing the concentration of that reactant has on the rate of the reaction.

So for this question you can use either the product rule or the quotient rule and I'll run through them both.First the quotient rule:The quotient rule says that if you have h(x)=f(x)/g(x)Then h'(x) = (f'(...

Firstly we need to rearrange this equation so that it contains only one trigonometric function of x (i.e. tanx, cosx or sinx) which will make it much easier to solve.

We can do this in th...

The key to any Paper 1 question is to organize your answer in a manner which makes you examiner feel like they're on cloud nine. Remember, your examiners go through a number of papers, which means that...

We can imagine our function as a curve. We have x values on the x axis and f(x) values on the y axis of our graph. 

The question is essentially asking us to find the area between the curv...