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Maths
A Level

What is the quotient rule and how is it applied?

The quotient rule is a formula used to differentiate fractions that contain terms of x in both the numerator and the denominator (we usually refer to this as f(x)/g(x)).
As it isn't possible to diffe...

PH
Answered by Pete H. Maths tutor
5279 Views

How can the cosine rule be derived?

Sorry in advance for the lack of a diagram, which would have made this explanation so much clearer. Also, the published version of this seems to ignore Unicode formatting, so I will add underscores (_)...

PT
Answered by Peter T. Maths tutor
3886 Views

Show that the integral of tan(x) is ln|sec(x)| + C where C is a constant.

First, recall that tan(x) can be rewritten in terms of sine and cosine.

tan(x) = sin(x)/cos(x)

The rephrasing of our question suggests that we should try the substitution ru...

AS
Answered by Anja S. Maths tutor
202854 Views

Solve the inequality 4x^2​>5x-1

We first rearrange the inequality to obtain

4x2-5x+1>0

Initially ...

CL
Answered by Christopher L. Maths tutor
8697 Views

How do I plot y=x^2-1?

To plot any graph, you need to find out where the curve cuts the x and y-axis, and where it's stationary points are, aswell as what type of stationary point you have.

Here are the steps:

<...
LP
Answered by Laura P. Maths tutor
5466 Views

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