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In my experience the sure fire way to prove trig identities is by doing the following: 1) Assess the question e.g. is it obvious you're going to need a double angle or addition formula, can you see where cos...

There are a few different types of integration, the most common being Riemann integration . Riemann integration allows you to find the area under the graph of a function between two points. Its definition us...

The reason why we factorise quadratic equation is because it is a neater and simpler way of writing the expression. Example 1 If we wanted to factorise x^2 + 10 + 21 we must look at factors of 21 that add up...

The electrons/ Pi bonds are delocalised2. It is made up of six Carbons in a ring with two rings of electon density above and below the plane of the ring.3. It has a lower electron density than alkenes with a...

The introduction and conclusion of an essay ensure that your writing flows. To have a cohesive beginning and ending will leave a reader assured that what you have asserted in your essay is fully justified an...