Top answers

Solve 2sec^2(x) = 3 + tan(x) for 0 < x <pi/2

Make use of identity sech^2(x) = tan^2(x) + 1 =&gt; 2{tan^2(x) + 1} = 3 + tan(x) Multiply out brackets and rearrange =&gt; 2tan^2(x) - tan(x) - 1 = 0 Use quadratic formula with a = 2, b = -1, c = -1 =&gt; ta...
RM
Answered by Robert M. • Maths tutor
8993 Views

Describe how the action of the mouth, oesophagus and stomach contributes towards the digestion of food? (6 Marks)

As this question is worth 6 marks, 6 different points need to be made to get all the marks. These could be two from each structure that is given. The teeth in the mouth break down food into smaller pieces (1...
CM
Answered by Charlotte M. • Biology tutor
12485 Views

In Emily Bronte's 'Wuthering Heights', to what extent can Heathcliff be depicted as a Byronic hero instead of a Gothic Villain?

The Byronic hero is an idealised but flawed character exemplified in the life and writings of Lord Byron, characterised by his ex-lover Lady Caroline Lamb as being &quot;mad, bad, and dangerous to know&quot;...
LF
13928 Views

In psychological research methods, what is the difference between reliability and validity?

The reliability of a research method refers to the consistency of a measure being used, and the ability to replicate that method e.g. someone who weighed them self throughout the day, would expect to see a s...
EW
2933 Views

How do I approach the unseen commentary (Paper 1)?

The unseen commentary can be very daunting - some students think you can't revise for it (because it's unseen, right?), but I think you can, and the key to doing well is: (1) to consider the key elements or ...
ET
7122 Views