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What's the difference between argument and analysis?

I choose this question because I remember it being one that confused me and my classmates greatly during the transition between GCSE and A-level. At GCSE, your answer is black and white. You're often asked a...
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Answered by Lawrence P. • History tutor
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Describe Gaseous exchange in the alveoli of the lungs

Lungs contain millions of alveoli which act as the gas exchange surface for the body, O2 is absorbed and Co2 is excreted by the body via the lungs which contain a large number of small 'air sacs' known as al...
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Answered by Oliver W. • Biology tutor
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Express 2 cos x – sin x in the form Rcos( x + a ), where R and a are constants, R > 0 and a is between 0 and 90 ° Give the exact value of R and give the value of to 2 decimal places.

2cosx - sinx = Rcos(x+a) = Rcos(x)cos(a)-Rsin(x)sin(a) Implying 2cos(x)=Rcos(x)cos(a) Rcosa = 2 Similarly: Rsin(a) = 1 Therefore tan(a) = 1/2 Meaning a=26.57 Degrees R 2 (sin 2 a+cos 2 a)=5 Implying, given s...
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Answered by Thomas O. • Maths tutor
33625 Views

Write a function that checks whether a number is prime or not.

Depending on the student level I would accept a simple answer such as: (cannot format code) or expect a more complex answer with optimization such as sieve of Eratosthenes
AC
Answered by Aimilios C. • Python tutor
1798 Views

Explain the main criticisms that have been made of the World Trade Organization. (15 marks)

WTO (originally the GATT), is an organisation, set up during the Bretton Woods Conference of August 1944, that attempts to liberalise world trade and prevent a slide to protectionism that was seen during the...
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