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Whether you want a homework, some cover work, or a lovely bit of extra practise, this is the place for you. And best of all they all well, most! Mathster is a fantastic resource for creating online and paper-based assessments and homeworks. They have kindly allowed me to create 3 editable versions of each worksheet, complete with answers.

## The Sine and Cosine Rule - 6 worksheets with answers

The Cosine Rule. Answer the questions in the spaces provided. The marks for each question are shown in brackets. GCSE Maths. Cosine Rule Questions. Using the cosine rule, in the first form, on triangle shows that. You are expected to know, or be able to work out, that

In more involved exam questions, you may have to use both the Cosine Rule and the Sine Rule over several steps to find the final answer. When finding angles with the Sine Rule, use the info in the question to decide whether you have the acute angle case ie the calculator value or the obtuse angle case ie, minus the calculator value. The Cosine Rule will never give you an ambiguous answer for an angle — as long as you put the right things into the calculator, the answer that comes out will be the correct angle. Give your answers accurate to 1 d. Choosing which rule or formula to use It is important to be able to decide which Rule or Formula to use to answer a question This table summarises the possibilities:. Using the cosine rules to find angles.

## Cosine Rules

I am now a retired teacher having taught for over 40 years in the UK at secondary level. I wanted to share my love of Mathematics and teaching by providing a good set of resources which will more than cover all your needs for as many topics as I can and at good value for money. I am trying to cover many topics from foundation level GCSE up to grade 9 at higher level in a way that is interesting and relevant. I hope you like my style! Sine Rule 2 - use the Sine rule to find the missing angles no ambiguous case - 10 Questions. Sine and Cosine Rules - miscellaneous questions where students have to decide which rule to use - 12 questions. Level 9 Cosine Rule Questions - Six more demanding questions for the more able student.

There are three identities relating to the trigonometric functions that make working with triangles easier:. The area rule states that the area of any triangle is equal to half the product of the lengths of the two sides of the triangle multiplied by the sine of the angle included by the two sides. Siyavula Practice gives you access to unlimited questions with answers that help you learn. Practise anywhere, anytime, and on any device! So far we have only applied the trigonometric ratios to right-angled triangles. We now expand the application of the trigonometric ratios to triangles that do not have a right angle:. Video: G.

## Sine cosine rule worksheet pdf

The Cosine Rule. Answer the questions in the spaces provided. The marks for each question are shown in brackets. GCSE Maths. Cosine Rule Questions.

Law of cosine worksheets with answers on the 2nd page of the pdf. Finding the missing values in triangles by using the trig formulas. Read it.

Search this site. Classroom Displays. Lesson resources. If it's not a right angled triangle then chances are it involves one of these three rules that can be found at the bottom left hand corner of the Formulae Sheet. If you get the step above correct then it doesn't really matter which side you label b and which side you label c.

С того места, где он стоял, казалось, что голова сотрудника лаборатории систем безопасности лишилась тела и осталась лежать на полу шифровалки. А потом медленно скрылась из виду в клубах пара. - Отчаянный парень, - пробормотал Хейл себе под нос. Он знал, что задумал Чатрукьян. Отключение ТРАНСТЕКСТА было логичным шагом в случае возникновения чрезвычайной ситуации, а ведь тот был уверен, что в машину проник вирус.

* Не я один его ищу.*