In Exercises 63–82, use a sketch to find the exact value of each expression. cot (csc⁻¹ 8)
Table of contents
- 0. Review of College Algebra4h 45m
- 1. Measuring Angles40m
- 2. Trigonometric Functions on Right Triangles2h 5m
- 3. Unit Circle1h 19m
- 4. Graphing Trigonometric Functions1h 19m
- 5. Inverse Trigonometric Functions and Basic Trigonometric Equations1h 41m
- 6. Trigonometric Identities and More Equations2h 34m
- 7. Non-Right Triangles1h 38m
- 8. Vectors2h 25m
- 9. Polar Equations2h 5m
- 10. Parametric Equations1h 6m
- 11. Graphing Complex Numbers1h 7m
5. Inverse Trigonometric Functions and Basic Trigonometric Equations
Inverse Sine, Cosine, & Tangent
Problem 97
Textbook Question
The graphs of y = sin⁻¹ x, y = cos⁻¹ x, and y = tan⁻¹ x are shown in Table 2.8. In Exercises 97–106, use transformations (vertical shifts, horizontal shifts, reflections, stretching, or shrinking) of these graphs to graph each function. Then use interval notation to give the function's domain and range. f(x) = sin⁻¹ x + π/2
Verified step by step guidance1
Identify the base function: here, the base function is the inverse sine function, \(y = \sin^{-1} x\), which has a known domain of \([-1, 1]\) and range of \([-\frac{\pi}{2}, \frac{\pi}{2}]\).
Understand the transformation applied: the function \(f(x) = \sin^{-1} x + \frac{\pi}{2}\) represents a vertical shift of the graph of \(y = \sin^{-1} x\) upward by \(\frac{\pi}{2}\) units.
Apply the vertical shift to the range: since the original range is \([-\frac{\pi}{2}, \frac{\pi}{2}]\), adding \(\frac{\pi}{2}\) to each value shifts the range to \([0, \pi]\).
Determine the domain of \(f(x)\): the domain remains unchanged by vertical shifts, so the domain is still \([-1, 1]\).
Summarize the transformed graph: the graph of \(f(x)\) is the graph of \(y = \sin^{-1} x\) shifted up by \(\frac{\pi}{2}\), with domain \([-1, 1]\) and range \([0, \pi]\).
Verified video answer for a similar problem:This video solution was recommended by our tutors as helpful for the problem above
Video duration:
3mPlay a video:
0 Comments
Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Inverse Trigonometric Functions
Inverse trigonometric functions, such as sin⁻¹x, cos⁻¹x, and tan⁻¹x, return the angle whose trigonometric ratio equals x. They have specific domains and ranges to ensure they are functions, for example, sin⁻¹x has domain [-1,1] and range [-π/2, π/2]. Understanding these restrictions is essential for graphing and transformations.
Recommended video:
Introduction to Inverse Trig Functions
Graph Transformations
Graph transformations include vertical and horizontal shifts, reflections, stretches, and shrinks that modify the parent function's graph. For f(x) = sin⁻¹x + π/2, adding π/2 shifts the graph vertically upward by π/2 units, affecting the range but not the domain. Recognizing these changes helps in sketching the transformed graph accurately.
Recommended video:
Introduction to Transformations
Domain and Range of Transformed Functions
The domain of inverse trig functions is determined by the input values for which the function is defined, while the range is the set of possible output values. Transformations like vertical shifts alter the range but typically leave the domain unchanged. Expressing domain and range in interval notation clarifies these sets precisely.
Recommended video:
Domain and Range of Function Transformations
Related Videos
Related Practice
Textbook Question
688
views
