Find the Exact Value $\cos 95 ^ { \circ } \cos 50 ^ { \circ } + \sin 95 ^ { \circ } \sin 50 ^ { \circ }$

question 77

Multiple Choice

Find the exact value. $\cos 95 ^ { \circ } \cos 50 ^ { \circ } + \sin 95 ^ { \circ } \sin 50 ^ { \circ }$

• A) \(\frac { 3 \sqrt { 2 } } { 2 }\)
• B) \(\frac { \sqrt { 2 } } { 2 }\)
• C) \(1\)
• D) \(- \frac { \sqrt { 3 } } { 2 }\)
• E) none

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Definitions:

Cross-sectional Study

An observational study that analyzes data from a population, or a representative subset, at a specific point in time to examine the presence of disease or other variables.

Health Outcomes

The results of medical conditions and/or health interventions on individuals, including changes in health status, quality of life, and mortality.

Variables Of Interest

Specific items that researchers seek to measure or observe within a study to understand patterns or associations.

Ecologic Fallacy

The error in reasoning that occurs when conclusions about individual-level processes are drawn from group-level data.