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A curve has parametric equations x= 2sin(t) , y= cos(2t) + 2sin(t) for -1/2 π≤t≤ 1/2π , show that dy/dx = - 2sin(t)+ 1

A parametric equation is where both x and y are expressed separately, in terms of a parameter (t). In order to differentiate them we must use the chain rule, which here would be dy/dx= dy/dt ÷ dx/dt. The dif...
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Answered by Katie L. • Maths tutor
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What are the different hypothesised methods of DNA replication.

There are 3 types: conservative, semi conservative and dispersive.conservative entails the original DNA strand remaining intact with a whole newly synthesised DNA strand being formedsemi conservative entails...
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Answered by Ronan F. • Biology tutor
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Explain how a fall in interest rates would affect aggregate demand (5 marks)

Aggregate Demand is equal to Consumption + Investment + Government Spending + (Exports - Imports). When interest rates fall, saving becomes less profitable, as consumers will receive a smaller additional pay...
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Answered by Rajiv S. • Economics tutor
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Explain the uses of unidirectional verbs of motion

Unidirectional verbs of motion denote movement in one particular direction, usually on one occasion often with a named destination. The movement is not necessarily in a straight line but in all instances the...
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Answered by Philip F. • Russian tutor
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Explain the process of peptide translation

Following transcription and splicing, mature mRNA travels to the ribosome and displays the start codon. A tRNA molecule which has an anti codon that is complementary to the mRNA start codon matches with the ...
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Answered by James S. • Biology tutor
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