Use the Fundamental Identities to Find the Value of the Trigonometric

question 31

Multiple Choice

Use the fundamental identities to find the value of the trigonometric function.
-Find $\cos \theta$ , given that $\tan \theta = - \frac { 4 } { 7 }$ and $\sin \theta > 0$ .

• A) \(- \frac { \sqrt { 65 } } { 7 }\)
• B) \(\frac { \sqrt { 65 } } { 4 }\)
• C) \(\frac { 7 \sqrt { 65 } } { 65 }\)
• D) \(- \frac { 7 \sqrt { 65 } } { 65 }\)

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Definitions:

Steel

A hard, strong alloy made primarily of iron and carbon, used extensively in construction and manufacturing.

Substitutes

Goods or services that can be used in place of each other, where an increase in the price of one leads to an increase in the demand for the other.

Demand

The measure of a good or service that patrons are eager and able to procure, across various pricing, throughout a certain duration.

Price Ceiling

A legally established maximum price for a good, or service. Normally set at a price below the equilibrium price.