What you need to know
Check yourself against these “I can” statements.
- I can use inverse sin, cos or tan to find a missing angle in a right-angled triangle
- I can choose the right ratio to find a side or an angle
- I can use trigonometry to solve problems in 2D
Practise this topic
4 resourcesRight-Angled Trigonometry: Mixed Problems
Sides and angles in right-angled triangles, with diagrams drawn to scale and worked solutions one triangle at a time: finding a side or an angle with and without a diagram, two steps, isosceles triangles and trapezia, elevation…
⚙️ WorksheetTrig: Finding Angles
SOH CAH TOA and the inverse, with diagrams drawn to scale: choose the ratio, two sides given, all sides given, Pythagoras then trig, isosceles triangles, trig twice (a side and an angle), then questions with no diagram. Seven…
⬢ BlockbustersRight-Angled Trigonometry: Mixed Problems Blockbusters
Blockbusters with the questions from the Right-Angled Trigonometry: Mixed Problems worksheet: choose its levels for the ordinary hexagons and for the harder ★ ones. Show the answer and the worked solution, or play against the…
⬢ BlockbustersTrig: Finding Angles Blockbusters
Blockbusters with the questions from the Trig: Finding Angles worksheet: choose its levels for the ordinary hexagons and for the harder ★ ones. Show the answer and the worked solution, or play against the computer with multiple…
These are the pages for Using Trigonometry to Find Angles in the Year 9 scheme of work, following Pearson Edexcel Maths Progress Delta 3, then GCSE (9–1) Higher (1MA1). Open this topic in Mr Wells Maths to see it alongside the rest of the course.