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A curve has equations: x=2sin(t) and y=1-cos(2t). Find dy/dx at the point where t=pi/6

Since this question concerns parametric's, one may move to eliminate t from the equation to calculate dy/dx directly. However, in this case it is much easier to use the chain rule and realise that dy/dx=dy/d...
CH
Answered by Cameron H. • Maths tutor
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Polyester is a common polymer used in clothing. State the name of the chemical reaction used to form polyester by reaction of ethanedioic acid and ethane-1,2-diol. Give the name of the molecule which is lost upon condensation of these two molecules.

Name of reaction is condensation polymerisation.Water is lost upon condensation of ethanedioic acid and ethane-1,2-diol (will draw this out on the whiteboard).
MW
Answered by Melissa W. • Chemistry tutor
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Vous décrivez là où vous habitez pour votre blog. Décrivez ...

In order to gain 10 out of 10 for the "content" side of this question, there are certain things a student must do. I would say the easiest way to gain a marker's confidence is responding to all fou...
SG
Answered by Saoirse G. • French tutor
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‘Much American literature is characterised by the importance of hope in adversity.’ By comparing at least two texts prescribed for this topic, discuss how far you have found this to be the case.

It is always worth bearing in mind the grounds upon which an answer responding to this question will be marked and I will meditate upon the use of context, which the criteria specifies, and this in two sense...
SG
Answered by Saoirse G. • English tutor
4251 Views

What are the advantages and disadvantages of being a Public Limited Company?

ADVANTAGES Being a PLC means that you are able to raise large amounts of funds from share holders quickly. Further to this, PLCs are able to gain credibility by being listed on the stock exchange and thus be...
KD
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