# Graphs of Cosine and Sine Functions

As noted previously, circular functions can be treated as functions of real numbers. In this module we will graph the Cosine and Sine functions.

**Review**: Even-Odd property, coterminal angle property, domain and range of the Cosine and Sine functions.

**Learning Objectives**:

- Periodicity and Periodic Functions; period of Cosine and Sine functions.
- Domain and Range of Cosine and Sine Functions
**Fundamental Cycle**- Apply transformations to find the graphs of f(x) = A COS (Bx + C) + D and A.SIN(BX + C) + D
- Sinusoids
- Amplitude, phase-shift, period and vertical-shift
- Rewrite sum or difference of cosine and/or
- sine expressions in terms of f(x) = A COS (Bx + C) + D or A.SIN(BX + C) + D