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Differentiate xcos(x) with respect to x.

How do we know which method of differentiation to use in this example? Well in ‘xos(x)’, we have 2 different functions: ‘x’ and ‘cos(x)’. Therefore, we must differentiate using the product rule. What is the ...
OS
Answered by Oliver S. • Maths tutor
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'Othello's virtue and valour ultimately make him admirable.' To what extent to do you agree with this view? (AQA A level English Literature question)

As a Venetian soldier, Othello holds a great deal of valour within his society, despite being an outcast due to his race. However, his virtue and valour are greatly undermined when he is prayed on by Iago, w...
KI
Answered by Katie I. • English tutor
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The length of a rectangle is five times the width. The area of the rectangle is 1620 cm(squared) Work out the width of the rectangle.

If the length is 5 times the width we can say that length=5a if width=a. We know the equation for: the area of a rectangle= length x width.In this case: area= 5a x a= 5a 2 and from the question we know that ...
SJ
Answered by Sophie J. • Maths tutor
11336 Views

What 2 reagents are required to form NO2+ (state conditions)? Write an equation for this reaction.

Concentrated sulphuric acid (H 2 SO 4 ) and concentrated nitric acid (HNO 3 ).H 2 SO 4 + HNO 3 -> HSO 4 - + H 2 NO 3 + H 2 NO 3 + <-> (equilibrium arrow, do not penalise if normal arrow used ) H 2 O...
EC
Answered by Eleanor C. • Chemistry tutor
3593 Views

Describe the process of ultrafiltration in the Kidneys.

Ultrafiltration occurs in the nephron, the functional unit of the kidney. Blood enters a coiled network of vessels called the glomerulus from the afferent arteriole at a high hydrostatic pressure. The glomer...
MM
Answered by Matthew M. • Biology tutor
23131 Views