Video Details

Title: Trigonometric ratios

Section: Pythagoras' theorem and trigonometry

Course: Essential Mathematics Year 9

Share video:

I would be really grateful if you can support the work I do by subscribing to my YouTube Channel. It really just tells me that people are watching and appreciating the content.

Click the link below to download your notes.

Trigonometric ratios

If your lesson notes are not downloading this may be due to your school blocking access to my notes server. If you try connecting at home, or using a different computer which is not controlled by your school, you will be able to download the notes.

good maths videos for middle school good maths videos good maths videos for high school good maths website good maths teacher maffs guru darren smyth maths tutorials trigonometric ratios what are trig ratios how do I find trig ratios SOHCAHTOA how do I use SOHCAHTOA finding missing sides and angles right angled triangles trigonomtry explained year 9 maths grade 9 maths
Trigonometric ratios
About Lesson

This video looks at what a trigonometric ratio is and how we can find them. It's part of the Year 9 course relating to Pythagoras and Trigonometry. I also spend time explaining what SOHCAHTOA is and how we can use it to find missing side lengths and angles when we have sides and angles given to us. There are a lot of worked examples and I make sure that the theory is explained in an easy to understand way.

Comments for this lesson

2 comments have been posted.

    July 6, 2025, 6:58 p.m. - Maja Clark   

    Thank you! These videos are incredibly helpful

    Aug. 3, 2025, 9:22 p.m. - Darren Smyth  moderator  

    No! Thank you for taking the time in making the comment. I really appreciate it!

Add comment to video

Required for comment verification