Choose a Category
1. Number
2. Algebra
3. Geometry (Shape + Space)
4. Handling Data
5. Measures
6. Advanced Level
7. Enrichment
8. Func Maths (Themed)
9. Func Maths: GCSE-Type Q's
10. Interesting Investigations
11. Puzzles Corner
12. Mental Maths 5000
13. Festive Maths Mania
14. GCSE Maths Booster: E - B
15. GCSE Maths Booster: F - C
16. GCSE Maths Booster: G - D
17. Maths Booster: L5 - 8 (800)
18. Maths Booster: L4 - 7 (800)
19. Maths Booster: L3 - 6 (800)
20. Key Stage 1
Click My Account to download your FREE PRESENTATIONS
LEA Logo
Product Information

Trigonometry Angles Greater Than 90 Degrees

Shape and Space Powerpoint Presentation

Trigonometry Angles Greater Than 90 Degrees

The presentation starts with two synchronized points moving around the sine wave and the unit circle. This is set to Bach, and is designed to get the class thinking as they enter the room. We then go on to formally establish this connection between the trigonometric ratios and the moving point on the circumference of a circle of unit radius.
As the point moves around the circle, the students plot the different values on their grid until they have the sine wave. A similar approach is taken for the cosine function. The tangent function is then defined. There are lots of problems to solve, historical notes and worksheets. This is a superb presentation with all concepts clearly explained with the use of diagrams and animation. Not to be missed!

Slides Animation Sound Worksheets Rating
35 y y y rating


Shopping Basket

Select A Display Currency
If your currency is not displayed, please choose either USD or GBP. Additional currencies will be available soon.
GBP (£)
USD ($)
EUR (€)
CAD ($)
AUD ($)
Currently set to: