Perform the Indicated Operations and Simplify the Result So There $$\cos 67 ^ { \circ } = \cos 13 ^ { \circ } \cos 54 ^ { \circ } - \sin 13 ^ { \circ } \sin 54 ^ { \circ }$$

question 309

True/False

Perform the indicated operations and simplify the result so there are no quotients.
- $$\cos 67 ^ { \circ } = \cos 13 ^ { \circ } \cos 54 ^ { \circ } - \sin 13 ^ { \circ } \sin 54 ^ { \circ }$$

---

Definitions:

Utility-Maximizing

Utility-maximizing is a principle in economics where individuals or entities choose the options that provide the highest satisfaction or utility from the available choices, given their preferences and constraints.

Substitute Goods

Products or services that can be used in place of each other. When the price of one falls, the demand for the other product falls; conversely, when the price of one product rises, the demand for the other product rises.

Consumer Behavior

The analysis of how consumers' preferences and economic decisions affect the demand for goods and services.

Marginal Utility

The change in total utility a person derives from consuming an additional unit of a good or service.