Math Problem Statement
Una sola tra le seguenti funzioni ha come dominio R. Individua quale, dandone esauriente spiegazione.
A. y=\sqrt{\cos x-x^2}
B. y=\sqrt{\cos x-\cos ^2x}
C. y=\sqrt{\cos x+x^2}
D. y=\sqrt{\cos x+\cos ^2x}
Solution
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Math Problem Analysis
Mathematical Concepts
Function domain
Square root function
Trigonometric functions
Formulas
Conditions for square root function
Theorems
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Suitable Grade Level
Advanced High School
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