Find the Exact Value of the Expression $\left( \sin 30 ^ { \circ } \right) ^ { 2 } - \left( \cos 30 ^ { \circ } \right) ^ { 2 }$

question 86

Essay

Find the exact value of the expression. $\left( \sin 30 ^ { \circ } \right) ^ { 2 } - \left( \cos 30 ^ { \circ } \right) ^ { 2 }$

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Definitions:

Direct Expense

Expenses that can be directly attributed to the production of specific goods or services, such as materials and labor.

Sales Salaries

Compensation paid to employees directly involved in the sales function of a business, typically comprising both base salary and commissions.

Administrative Expense

Expenses related to the general operation of a business, including salaries of executive personnel, accounting and legal services, and insurance.

Janitorial Services

A category of services that includes cleaning, maintaining, and often securing commercial or residential buildings.