Cosine Course
Dive into cosine from unit circle foundations through advanced identities and real-world modeling. This course equips math teachers and pros to handle graphs, create precise periodic models, and tackle right and oblique triangle challenges with skill and accuracy. Perfect for building reliable trig expertise step by step.

from 4 to 360h flexible workload
valid certificate in your country
What will I learn?
This course offers a clear, hands-on guide to cosine mastery, starting from unit circle basics, symmetry, and key angles, up to vital identities. Gain skills to interpret and draw transformed cosine graphs confidently. Use cosine for periodic modeling, triangle solutions, and simple explanations for newcomers, with reliable examples, diagrams, and checks ready to use right away.
Elevify advantages
Develop skills
- Master cosine graphs: read, sketch, and shift y = A cos(ωx + φ) + C with speed.
- Model real cycles: craft cosine functions for motion, daylight hours, and turns.
- Apply cosine in triangles: solve geometry using cos and law of cosines.
- Harness trig identities: simplify, adjust, and solve cosine equations.
- Explain cosine simply: create diagrams, examples, and guides for beginners.
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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