## The exact values for sin and cos 0, 30, 45, 60 and 90

GCSE Maths revision tutorial video. For the full list of videos and more revision resources visit www.mathsgenie.co.uk.

www.onmaths.com is an excellent new website to help you with your GCSE maths revision. You will find practice papers that tell you straight away if you have got each question right or wrong, and the graphic shows you what grade you are achieving. If you get stuck each question is explained on a video.

Here is a great tool to show constructions on a computer or Interactive White Board.

Hopefully you already know how to change a fraction to a decimal.

For instance ²⁄³ =2 ÷ 3= 0.6666… This is a recurring decimal. But changing a recurring decimal back to a fraction is a little more complicated.

UK maths teacher have produced a great video on this.

If you prefer a written explanation Study maths have produced a good introduction of how to convert a recurring decimal to a fraction.

http://studymaths.co.uk/topics/convertingRecurringDecimalsToFractions.php

There is also an interactive worksheet to make sure you can do it.

Here is a video from UK maths teacher explaining how to draw box plots.

Here is a great interactive exercisefrom www.cimt.plymouth.ac.uk to make sure you understand box and whisker diagrams.

http://www.cimt.plymouth.ac.uk/projects/mepres/book9/bk9i16/bk9_16i4.html

Many thanks to Mr Barton for this excellent quiz.

Here is a great quiz from karenjs231 on angles. Remember in GCSE there are often angles questions where 1 mark is for finding the right answer and the other is for explaining why, eg stating angles in an isosceles triangle add up to 180 degrees and 2 must be equal.

Fed up with your GCSE revision? Try these new quizzes. You’ll find lots of different topics. Beware, they are designed to catch you out! The authors have thought carefully about the mistakes you are likely to make. So when you get to the end of a quiz look carefully at the mistakes you have made and make sure you understand where you went wrong.

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This is one in a large series of short videos from NCETM showing how people use maths at work. See the others here.