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What is the significance of Margaret Thatcher's entry into the Exchange Rate Mechanism in 1990?

Economic significance: The decision to enter ERM in 1990 was economically detrimental as this occured at a time when the £ was valued too highly compared to the Deutschmark, meaning the exchange rate could n...
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Answered by Hubert B. • History tutor
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Why have UK citizens become disillusioned with politicians and politics in general since the 1940s?

There are two main explanations for this trend: The 'Demand Side' explanation suggests that people are less engaged with politics because of the citizens themselves; in other words it is not the fault of pol...
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Answered by Hubert B. • Politics tutor
3824 Views

Find the turning point of the function y=f(x)=x^2+4x+4 and state wether it is a minimum or maximum value.

In order to find turning points, we differentiate the function. Hence we get f'(x)=2x + 4. Setting f'(x)=0 we get x = -2 and inputting this into f(x) we get y = 0 therefore the turning point is (-2,0). To fi...
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Answered by Basim A. • Maths tutor
13906 Views

Differentiate arctan(x) with respect to x. Leave your answer in terms of x

Let y = arctan(x). Arctan(x) is difficult to differentiate but I know how to differentiate tan(x) (=sec^2(x)) so take the tan of both sides: tan(y) = x. The next step will be to differentiate both sides. To ...
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Answered by Benedict C. • Maths tutor
5447 Views

Differentiate with respect to x: 3 sin^2 x + sec 2x

6 sinx cosx + (2 sin 2x)/(cos^2 2x)
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Answered by Hugo M. • Maths tutor
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