Write an expression that generates all angles coterminal with each angle. Let n represent any integer. ―90°
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
1. Measuring Angles
Angles in Standard Position
Problem 123
Textbook Question
Solve each problem. See Example 6. Revolutions of a Turntable A turntable in a shop makes 45 revolutions per min. How many revolutions does it make per second?
Verified step by step guidance1
Identify the given information: the turntable makes 45 revolutions per minute (rpm).
Recall the conversion factor between minutes and seconds: 1 minute = 60 seconds.
Set up the conversion to find revolutions per second by dividing the revolutions per minute by the number of seconds in a minute: \(\text{revolutions per second} = \frac{45}{60}\).
Simplify the fraction to express the revolutions per second in simplest form.
Interpret the result as the number of revolutions the turntable makes in one second.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Unit Conversion between Minutes and Seconds
Understanding how to convert time units is essential. Since 1 minute equals 60 seconds, converting revolutions per minute (rpm) to revolutions per second (rps) involves dividing the number of revolutions by 60.
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Revolutions as a Measure of Angular Displacement
A revolution represents one complete turn or rotation. Knowing that revolutions count the number of full rotations helps interpret the problem and convert between different time-based rates of rotation.
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Rate and Proportional Reasoning
The problem involves rates, specifically revolutions per unit time. Applying proportional reasoning allows you to scale the given rate (per minute) to a different time frame (per second) accurately.
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