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A curve has parametric equations -> x = 2cos(2t), y = 6sin(t). Find the gradient of the curve at t = π/3.

First we need to find the derivatives of x and y in terms of t. dx/dt can be found using the chain rule. Differentiating the inside of the bracket gives us 2. Multiplying the outside gives -2sin(2t) (Derivat...
MM
Answered by Matvei M. • Maths tutor
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What is the difference between the leading and the lagging strand in DNA replication?

DNA replication is a semi-conservative process, which creates an identical replica of an already existing DNA double helix sequence. During DNA replication, the two antiparallel DNA strands are split in to t...
JH
Answered by Jenna H. • Biology tutor
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Solve 4 + 3(2x - 5) = x + 9.

4 + 3(2x - 5) = x + 9, 3(2x - 5) = x + 5, 6x - 15 = x + 5, 5x = 20, x = 20/5, x = 4
MC
Answered by Megan C. • Maths tutor
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Can you please explain when I have to use each case?

As we know, every noun has a gender, but that gender also has four different variations, depending on where it lands in a sentence. 2. The four cases are: nominative, genitive, dative and accusative a) nomin...
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Answered by Sonja W. • German tutor
1896 Views

How do I remember the common values of cosx, sinx and tanx?

To remeber the equations us SOH CAH TOA. This is Sinx = Opposite/Hypotenuse, Cos x = Adjacent/Hypotenuse and Tanx = Opposite/Adjacent. For values x=pi/3 and x=pi/6 always start by drawing an equilateral of s...
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Answered by Becky L. • Maths tutor
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