Math Problem Statement
(c) Plot the graph of y = 0.5 sin 2x for 0 ≤ x ≤ 360. Use the graph to find the amplitude and the period of the graph. (6 marks)
Solution
To analyze the function over the interval , let's break down the steps to plot the graph and determine its amplitude and period.
Step 1: Identify Key Characteristics
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Amplitude: The amplitude of a sine function is given by the absolute value of . Here, , so the amplitude is:
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Period: The period of a sine function is calculated using the formula: where in this case. Thus, the period is:
Step 2: Plot the Graph
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Create a Table of Values: Calculate values of at key points in the interval.
(degrees) 0 0 30 0.5 60 0.866 90 1 120 0.866 150 0.5 180 0 210 -0.5 240 -0.866 270 -1 300 -0.866 330 -0.5 360 0 -
Plot Points: Using these calculated values, plot the points on a coordinate system and connect them to form the sine wave.
Step 3: Graphing Tool
To visualize, you can use graphing software or a graphing calculator to plot these points. The graph will oscillate between 0.5 and -0.5 with a repeating pattern every 180 degrees.
Step 4: Conclusion
From the graph, you can confirm:
- Amplitude: 0.5
- Period: 180 degrees
If you need the graph plotted or further clarification, let me know!
Additional Questions
- How do you derive the sine function's properties from its equation?
- What are other trigonometric functions and their characteristics?
- How can you apply this knowledge to solve real-world problems?
- What happens to the amplitude if the coefficient in front of the sine function changes?
- How would the graph change if the function were ?
Tip: When analyzing periodic functions, always note their amplitude and period as they significantly impact their shape and behavior.
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Math Problem Analysis
Mathematical Concepts
Trigonometry
Sine Functions
Graphing
Formulas
Amplitude = |A| for y = A sin(Bx)
Period = 360° / B
Theorems
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Suitable Grade Level
Grades 9-12