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3cos(2A)-5cos(A)+2=0. The first thing we do is use a trignometric identity, namely cos(2A) = 2(cos^2(A))-1. This gives us a new form of the original equation. 3(2(cos^2(A))-1)-5cos(A)+2=0: we expand out the ...

expand the brackets X 2 + 6x - 5x - 30 2) collect like terms X 2 + x - 30

A priori knowledge is knowledge that can be acquired without having to 'look at the world'. A priori knowledge is independent of the empirical world in two ways: i) it's truth does not depend on anything hap...

A deontological ethical theory is a theory which focuses on rules. Actions are right or wrong depending on whether or not they conform to the rule in question. For deontologists lying is wrong in virtue of t...

Most importantly, your essay should respond directly to the question so the use of question terms is important throughout especially in your introduction and conclusion. A good essay structure would open wit...