Use a Calculator to Find an Approximate Value of Each $\cos ^ { - 1 } ( - 0.25 )$

question 45

Essay

Use a calculator to find an approximate value of each expression correct to five decimal places, if it is defined.
(a)
$\cos ^ { - 1 } ( - 0.25 )$
(b)
$\sin ^ { - 1 } ( 3 / 4 )$

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Definitions:

Market Demand

The total quantity of a product or service that consumers are willing and able to purchase at various prices within a given period.

Competitive Industry

A market in which multiple firms compete against each other to sell their goods or services to consumers.

Long-Run

A period in economics during which all factors of production and costs are variable, allowing full adjustment to change.

Indifference Principle

A concept in economics that suggests a consumer has no preference between two bundles of goods because both provide the same level of utility or satisfaction.