Use the Appropriate Reciprocal Identity to Find the Function Value $\cos \theta$

question 38

Multiple Choice

Use the appropriate reciprocal identity to find the function value. Rationalize the denominator if necessary.
- $\cos \theta$ , if $\sec \theta = - 3$

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

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Definitions:

Brightness Constancy

The human visual system's ability to perceive the relative brightness of objects regardless of the amount of light illuminating them.

Cloudy Days

Days characterized by a significant coverage of the sky by clouds, often leading to reduced sunlight and cooler temperatures.

Reflects

Shows evidence of, indicates, or expresses a particular quality, condition, or situation.

Binocular Cues

Visual cues to depth or distance requiring two eyes.