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Mathematics - Trigonometry

Trigonometry can be tricky, so these lessons are designed to introduce the basics of trig, explain difficult problems and give you a chance to gain confidence by practising trigonometry. Concepts and formulae are given in a glossary and the lessons are summarized in handy, printable revision sheets. We'll have more interactive lessons here shortly, so make sure to come back soon.

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»   Pythagoras Theorem lesson | lesson details | launch revision
»   The Sine Rule lesson | lesson details | launch revision

30°, 45° & 60° Angles lesson | lesson details |  
Triangles with angles greater than 90° lesson | lesson details |  

»   Area of a Triangle lesson | lesson details | launch revision
»   The Triangle, some basics lesson | lesson details | launch revision

Disclaimer for teachers:
All Maths’ content on is developed by experienced Maths’ teachers and reflects the new Junior Cycle Maths’ curriculum and the latest Department of Education guidelines.

To find out about the Subject Experts who have helped create these lessons, click here.

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