Chapter 2: Problem 74
Range of the function \(f\) defined by \(f(x)=\left[\frac{1}{\sin \\{x\\}}\right]\) (where \([\cdot]\) and \(\\{\cdot\\}\) respectively denote the greatest integer and the fractional part functions is:) (A) \(\mathrm{Z}\), the set of integers (B) \(\mathrm{N}\), the set of natural numbers (C) W, the set of whole numbers (D) \(\\{2,3,4, \ldots\\}\)
Short Answer
Step by step solution
Understand the Function Composition
Analyze the Domain of \(f(x)\)
Evaluate \(\frac{1}{\sin(x)}\)
Apply the Greatest Integer Function
Determine the Range of \(f(x)\)
Choose the Correct Answer
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Key Concepts
These are the key concepts you need to understand to accurately answer the question.
Greatest Integer Function
- Notations: Sometimes referred to as the floor function or the integer part function.
- Symbolic representation: \([ \cdot ]\)
- Important property: If \(n\) is an integer, exactly \(\lfloor n \rfloor = n\).
Range of a Function
- It helps to define the scope and limits of a function, reinforcing what values are accessible as outputs.
- This concept can capture trends, such as whether a function can return negative values or stays constrained within a certain boundary.
- Each function may have unique range properties, understandable through analysis.
Trigonometric Functions
- The sine function, \(\sin(x)\), oscillates smoothly between -1 and 1 over its domain, providing crucial implications when taking its reciprocal.
- Being periodic, \(\sin(x)\) repeats its values in cycles, which is important in defining the behavior of functions relying on sine values.
- For this problem, knowing that \(\sin(x)\) never reaches zero is vital, as division by zero is undefined and avoided.