This video is all about using the cosine rule, and is aimed at around grade 6 GCSE Maths. It’s quite likely to be a non calculator question. You need to find x after being given three sides of a triangle (x+2), (root73) and (2x-3); as well as one angle of 60 degrees. Top Tips! Always write the formula Work methodically down the page Label angles … [Read more...]

## Changing the subject of a formula – grade 6 maths GCSE

This video is all about changing the subject of a formula, and is aimed at around grade 6 GCSE maths. The difficulty with this type of question is the requirement to factorise: Make y the subject of the formula 3(y + 2) = a(5 - 2y) These types of questions appear in all the main examination boards, including Edexcel, AQA and OCR. They are popular and, once … [Read more...]

## Simplify an algebra fraction using factorising

Algebra Fractions using factorising These questions are all about how to simplify algebra fractions and are popular on non calculator GCSE maths papers. They are either straightforward ... or fairly difficult. The example in the picture shows the bottom expression as "2x squared ..." and that type of question would be considered quite challenging. Here's some videos to … [Read more...]

## Algebra expressions – advanced algebraic GCSE maths

Algebra expressions ... are becoming quite popular with GCSE maths questions. They are usually about reducing fractions and working with indices. Top Tips! ● They are sometimes called ‘working with indices’ ● Learn the rules and try to apply them consistently ● Remember that an index of a half ... means a square root ● ...and an index of a third .... means a cube root ● … [Read more...]

## Parallel or perpendicular lines on a graph – mid-level questions

Perpendicular lines on a graph ... are one of those questions that come up fairly infrequently, although it can be an easy few marks if you remember how to plot them. Parallel lines tend to be more popular so I've included both types of questions in the videos below. Top Tips! ● Draw accurately and use a table to work out the points you need ● Parallel lines have the same … [Read more...]