Cosine Course
Gain expertise in cosine, from unit circle fundamentals to advanced identities and practical modelling. This course equips mathematics teachers and professionals to analyse graphs accurately, create precise periodic models for cycles like daylight or motion, and solve both right and oblique triangle problems with confidence and clarity.

flexible workload from 4 to 360h
valid certificate in your country
What will I learn?
This course offers a practical guide to mastering cosine, starting from basic principles up to real-world applications. You will understand the unit circle, symmetry, important angles, and main identities. Learn to interpret and draw transformed cosine graphs confidently. Use cosine for modelling periodic events, solving triangle problems, and explaining concepts simply for beginners, with clear examples, diagrams, and reliable practice questions.
Elevify advantages
Develop skills
- Master cosine graphs: quickly read, sketch, and transform y = A cos(ωx + φ) + C.
- Build cosine models for real-life cycles such as motion, daylight variations, and rotations.
- Solve triangle problems using cosine and the law of cosines.
- Apply key trigonometric identities to simplify expressions, transform functions, and solve equations.
- Explain cosine concepts clearly with effective visuals, examples, and beginner-friendly teaching methods.
Suggested summary
Before starting, you can change the chapters and workload. Choose which chapter to start with. Add or remove chapters. Increase or decrease the course workload.What our students say
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