If you look at the fractions for Sine rule, you will only need 2 of the fractions the a/sin A and b/sin B.

There are 4 unknowns in those 2 fractions.

2 angles and 2 side lengths that are opposite.

You can only solve an equation where one thing is unknown.

This means if you have a question that requires sine rule, the question has to give you the following information:

Now, sadly we don’t get the fun robot anymore, instead we get something that looks like this:

f(x) = x + 10

That is the maths way to write what’s happening in the picture above.

It means that whatever x is, add 10 to it. X is the input.

If we want to input 5 we can write:

I know this is your favourite topic, definitely what you want to spend your free time on a Sunday evening doing…ok, maybe not, but I’m hoping to make it painless enough for you to understand and get some easy marks in the exam.

This post is going to be all about Trigonometry, I will be starting with pythagoras, which isn’t really trig, but you need to know it to do the rest.

Just when you feel like you’ve got simultaneous equations sorted they throw in a quadratic into the mix.

Remember algebra makes up a huge part of GCSE Maths and so if you struggle with expanding, factorising etc. you really need to work on that.

Improving your algebra is one of the fastest ways to improve your grade.

Just made a quick video in case you are stuck on completing the square.

With completing the square, it looks and sounds scarier than it is.

What you are doing is rewriting a quadratic in a different form.

So in this example, we want to write x^2 + 4x + 5 in completed square form.

In this post I will cover everything you need to know about circle geometry for both gcse maths foundation and higher tier:

Parts of a circle

Area and circumference

How to use pi

Practice questions

Possible exam questions