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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
7169 Views

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
3165 Views

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
18938 Views

How can I get the best result in my speaking exam?

I find with speaking exams, although daunting can be broken down into a formula for success! Using variety of stock phrases, idioms, grammar points and intresting facts is something I work on with students a...
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Answered by Emily J. • French tutor
2262 Views