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Maths

A Level

How do I integrate sin^2(x)?

First, remember the compound angle formula for cosine:

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Answered by Christopher D. • Maths tutor

5696 Views

What is the sum of the first n terms of a geometric sequence and where does it come from?

Recall that a geometric progression is a sequence (a_n) defined ...

Answered by Kamil N. • Maths tutor

4942 Views

What is the 'chain rule'?

The chain rule is incredibly useful when differentiating compositions of funcions.

Until now you have really only met dy/dx as your derivative. By imagining dy/dx as a fraction, you...

Answered by James A. • Maths tutor

4591 Views

How do you take the derivative of a^x ?

There are two ways you can take the derivative of a^x.
1)
Let y = a^x now we're trying to find dy/dx
2)
ln(y) = xln(a) take logs of both sides and use log rules
3)
(dy/dx)...

Answered by Sam G. • Maths tutor

6476 Views

What is the best way to prove trig identities?

In my experience the sure fire way to prove trig identities is by doing the following:
1) Assess the question e.g. is it obvious you're going to need a double angle or addition formula, can you see w...

Answered by Sam G. • Maths tutor

5347 Views