The basic trigonometric ratios are sine, cosine and tangent and are used to find the lengths of sides and the size of angles in rightangled triangles.

Teacher: Click the play button in the centre of the video screen above. In the bottom right corner of the video (when you cursor moves over the playing video) is a broken square button which opens fullscreen mode. Trigonometry VideoThe basic trigonometric ratios are sine, cosine and tangent and are used to find the lengths of sides and the size of angles in rightangled triangles.There are plenty of other maths videos in the collection which are perfect when you need a change of focus. There are funny videos, instructional videos and videos that will inspire and motivate. Add this video to Google Classroom: 

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John Rodger,
Thursday, November 17, 2022
"Hi, I have looked for something that specifically looks at angles of elevation and depression. Unable to find these as a separate of questions. Do you have a specific of questions relating to this?
Many thanks.
[Transum: Thanks for your comment John. You can find examstyle questions on the Angles of Elevation and Depression page.]"