Write the Given Expression as the Cosine of an Angle $\cos 45 ^ { \circ } \cos 40 ^ { \circ } + \sin 45 ^ { \circ } \sin 40 ^ { \circ }$

question 3

Multiple Choice

Write the given expression as the cosine of an angle.
$\cos 45 ^ { \circ } \cos 40 ^ { \circ } + \sin 45 ^ { \circ } \sin 40 ^ { \circ }$

---

Definitions:

Local Contrast

A change in behavior that occurs following a change in reinforcement contingency; the change in behavior fades with extended training.

Systematic Contrast

A phenomenon in experimental analysis where differences in response are systematically altered to observe differences in outcomes, often used in psychological and behavioral research.

Making Pizzas

The process of preparing and baking pizzas, which involves creating the dough, adding toppings, and cooking in an oven.

Hourly Rate

The amount of compensation or payment received for each hour of work performed.