Sine and Cosine Rules GCSE Interactive Lesson

Sine and Cosine Rule is a completely interactive lesson designed to teach GCSE learners how to use the sine and cosine rules to find unknown sides and angles

Learning Objectives:

• use the sine rule to find unknown sides and angles;

• use the cosine rule to find unknown sides and angles;

• explain and use the relationship between the sine and cosine of complementary angles;

• use trigonometric ratios and the Pythagorean Theorem to solve right triangles in applied problems

• combine trigonometric skills to solve problems;

• derive the formula A = 1/2 ab sin© for the area of a triangle by drawing an auxiliary line from a vertex perpendicular to the opposite side.

• prove the Laws of Sines and Cosines and use them to solve problems;

• understand and apply the Law of Sines and the Law of Cosines to find unknown measurements in right and non-right triangles.

What is in the lesson:

• 39 interactive slides;

• drag and drop activities with instant learner feedback;

• differentiated questions as well as answers

• printable worksheets

Teachers can use this lesson for whole-class teaching. It can also be used for practice and revision by learners at home.

What this lesson can be used for:

• Teacher-led question and answer session

• Skill consolidation

• Google classroom

• Revision, practice, home learning

• Flashcards and Worksheets can be printed and laminated to be used as many times as possible.

• Starter activity and/or plenary

Save 20% when you buy this  as part of the Trigonometry Bundle

Other topics in this range include but are not limited to:

• 3D Coordinates

• Arc length and sector area

• Bearings

• Circle Theorems

• Trigonometry

• Pythagoras Theorems

• Congruency and Similarities

Product License

This is a single-user license. Unlimited use for you and your students. However, you may not distribute additional copies to friends or fellow teachers.