Derivatives of sine, cosine and tangent and periodic models

What this note covers

1. Radians and the meaning of the derivative
2. Amplitudes, phases and linear inner functions
3. Tangents, turning points and interval signs
4. Motion and repeated differentiation
5. Interpreting a periodic model responsibly
6. Deriving the tangent-function rule from a quotient
7. Nonlinear phases and combined differentiation rules
8. A complete periodic model with independent checks

8 sections · 10 key terms & formulas · 6 common mistakes