Without Using a Calculator, Give the Exact Trigonometric Function Value $\frac { \sqrt { 2 } } { 2 }$

question 134

Multiple Choice

Without using a calculator, give the exact trigonometric function value with rational denominator.
-cos 60°

• A) \(\frac { \sqrt { 2 } } { 2 }\)
• B) \(\frac { \sqrt { 3 } } { 2 }\)
• C) \(\frac { 2 \sqrt { 3 } } { 3 }\)
• D) \(\frac { 1 } { 2 }\)

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Definitions:

Quantity Supplied

The complete sum of a good or service that manufacturers are able and eager to provide at a certain price throughout an established duration.

Quantity Demanded

The amount of a good or service that consumers are willing to buy at a given price at a specific time.

Equilibrium Price

The price point at which the quantity of goods supplied equals the quantity demanded, resulting in market balance.

Equilibrium Quantity

At the equilibrium price, the volume of goods or services both offered and sought.