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Why do we get cos(x) when we differentiate sin(x)?

If we have an equation for a line, it follows a certain shape when put it on Cartesian axes. If we wish to find the value of the gradient of the graph at a certain coordinate, we can use differentiation to g...
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Answered by Sophie H. • Maths tutor
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Explain price elasticity of demand

Price elasticity of demand shows the responsiveness of the demand of a product to a change in price. This indicates the level of necessity or luxury of that good. For example, a litre of milk would be relati...
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Answered by Rohan D. • Economics tutor
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How could religious freedom be problematic for religious people?

Thinking a bit outside the box, by connecting concepts such as assimilation and immigration with this question gives a new perspective. Ethnic minorities immigrating to the UK, for instance, may be worried a...
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How is glucose absorbed by the body?

Glucose is a product of carbohydrate digestion, the absorption of which into the blood stream involves two main stages: 1) Diffusion into the blood: When carbohydrates are first broken down, there's a higher...
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What hormones are involved in a pregnancy test and how does it work ? (6 marks)

After the human embryo implants in the uterus, the site of the developing placenta begins to produce a chemical called human chorionic gonadotrophin (hCG). hCG is a hormone that is found in the blood and uri...
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Answered by Ellie B. • Biology tutor
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