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The key concepts to apply in this question will be the product and chain rules, namely: if  f(x)=g(x)h(h), then f'(x)=g(x)h'(x) + g'(x)h(x), and if h(x)=u(v(x)), then h'(x)=u'(v(x))v'(x).

Equivalen...

Over many years, language has been categorised on the basis of gender suggesting that 'Men are from Mars and Women are from Venus'; a view adopted by John Gray. Difference theorists like Jane Pilkington a...

A conclusion is a summary of the key arguments that have been presented throughout the essay. It is the last part of your essay that an examiner will read and so it's vital to conlude and answer the quest...

We start by expanding out the double trigonometric terms (sin(2a)) using the double angle formula, giving us: [2sin(a)cos(a)] / [1+cos^2(a) - sin^2(a)]. Next we spot that on the denominator (bottom half o...

Chlorine has a higher electronegativity, but as it has a large atomic radius the electron density is spread out over a large area. This means that the electron density is too low to form proper hydrogen b...