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We have a "fraction" which we wish to differentiate, so we use the quotient rule with u=sin(x) and v=cos(x).

This means that d/dx of u/v = (vdu/dx - udv/dx)/(v^2).

y = cos(x)/sec²(x) = cos³(x)

y = cos(x)(1-sin²(x)) = cos(x) - cos(x) sin²(x)

-> sin(x) - sin³(x)/3 + c

Quotes are an incredibley important part of any English literature essay becuase they provide evidence from the primary source (the text) for the claims you are making in your argument. Firstly you want t...

Overall Structure

The best way to structure your essay would be:

1. Introduction - include contextual background and state your Line of Argument (what you are going t...

This isn't a trick so much as a way to let you show you can think for yourself. You might be thrown off initially if a quadratic equation is in a format that you don't recognise, but usually all it takes ...