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Was the Cold War in fact 'cold'?

The war that took place between 1945 and 1991 has been termed the 'Cold War', largely due to the fact that the two main agitators (The Soviet Union and The United States of America) never came into direct co...
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Answered by Imogen S. History tutor
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Finding stationary points

Finding stationary points. You can find stationary points on a curve by differentiating the equation of the curve and finding the points at which the gradient function is equal to 0. One way of determining a...
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Answered by Jessica F. Maths tutor
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When do I use a cosine rule over a sine rule?

Both the sine and the consine rule applies to any triangle, you do not necessary need a right angle! You can usually use the cosine rule when you are given two sides and the included angle (SAS) or when you ...
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Answered by Jessica F. Maths tutor
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How do you integrate xcos(x)?

Using integration by parts: split xcos(x) into x multiplied by cos(x). Differentiating x gives 1 and integrating cos(x) gives sin(x). The integral of xcos(x) can therefore be rewritten as xsin(x) - integral ...
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Answered by Aleksandr B. Maths tutor
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Explain why monopolies may be an undesirable form of market structure

In theory, a monopoly is a situation in which the ‘industry is the firm’ however in reality in the UK we consider anything which controls 25% or more of the market to have monopoly power and the Competition ...
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Answered by Jessica F. Economics tutor
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