Find All Solutions Of $\cos ^ { 2 } x = \cos x + 6$

question 54

Essay

Find all solutions of $\cos ^ { 2 } x = \cos x + 6$ .

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Definitions:

Marginal Revenue

The increase in revenue a business achieves through the sale of one extra item or service.

Cable TV

A method of providing TV programming to viewers through radio frequency signals sent via coaxial cables or through pulses of digital light.

Tuition Fees

Charges imposed by educational institutions for instruction and other services, a major component of the cost of higher education.

Price-Elastic Demand

Describes a situation where the quantity demanded of a good or service significantly changes in response to changes in its price.