To draw the graph of the sine function, follow these steps:
1. Determine the amplitude of the sine function. The amplitude is the distance from the midline to the maximum or minimum value of the function. The amplitude of the sine function is always 1.
2. Determine the period of the sine function. The period is the distance between two consecutive peaks or troughs of the function. The period of the sine function is 2π.
3. Plot the midline of the sine function, which is the line y = 0.
4. Plot the maximum and minimum values of the sine function. The maximum value is 1 and the minimum value is -1.
5. Divide the period into four equal parts (π/2, π, 3π/2, 2π) and plot the corresponding points on the graph.
6. Connect the points with a smooth curve to complete the graph of the sine function.
The graph of the sine function will oscillate between the maximum and minimum values, crossing the midline at the points where the function equals zero. The graph will repeat itself every 2π units along the x-axis.
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Google Gemini AI
Jun 7
Steps to Draw the Graph of a Sine Function:
1. Establish the Period: - The period of a sine function is the distance between any two consecutive peaks or troughs. - The period is given by: T = 2π/|ω|, where ω is the angular frequency.
2. Draw the Horizontal Axis (x-axis): - Label the x-axis with values from 0 to 2π (one period).
3. Determine the Amplitude: - The amplitude is half the distance between the highest point and the lowest point of the graph. - Label the y-axis with values that span from -A to A, where A is the amplitude.
4. Find the y-Intercept: - The y-intercept is the point where the graph crosses the y-axis. - For a sine function, the y-intercept is typically 0.
5. Create a Reference Circle: - Draw a unit circle centered at the origin. - The x-coordinate of a point on the circle represents the cosine value, and the y-coordinate represents the sine value.
6. Calculate the Sine Values: - Divide the x-axis into equal intervals corresponding to the desired number of points on the graph. - For each interval, find the sine value using the corresponding point on the reference circle.
7. Plot the Points: - Plot the points on the graph at (x, y), where x is the x-coordinate of the point on the x-axis and y is the sine value calculated in step 6.
8. Connect the Dots: - Connect the plotted points with a smooth curve.
Additional Considerations:
- Phase Shift: If the sine function has a phase shift of h, the graph will shift h units to the left or right. - Vertical Shift: If the sine function has a vertical shift of k, the graph will shift k units up or down.
Example:
To graph the function f(x) = 2sin(x), follow these steps:
1. Period: T = 2π/1 = 2π 2. Amplitude: A = 2 3. Y-Intercept: y = 0 4. Reference Circle: Unit circle centered at (0, 0) 5. Sine Values: - x = 0: sin(0) = 0 - x = π/4: sin(π/4) = 1/√2 - x = π/2: sin(π/2) = 1 - x = 3π/4: sin(3π/4) = 1/√2 - x = π: sin(π) = 0 6. Plotting Points: - (0, 0) - (π/4, 2/√2) - (π/2, 2) - (3π/4, 2/√2) - (π, 0) 7. Connecting the Dots: Sketch a smooth curve through the points.