In Exercises 1–10, indicate if the point with the given polar coordinates is represented by A, B, C, or D on the graph. (3, π)
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- 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
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- 9. Polar Equations2h 5m
- 10. Parametric Equations1h 6m
- 11. Graphing Complex Numbers1h 7m
9. Polar Equations
Polar Coordinate System
Multiple Choice
Plot the point on the polar coordinate system.
(−2,32π)
A
B
C
D
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Verified step by step guidance1
Understand that polar coordinates are given in the form (r, θ), where r is the radius (distance from the origin) and θ is the angle from the positive x-axis.
The given polar coordinate is (-2, \(\frac{2\pi}{3}\)). The negative radius indicates that the point is in the opposite direction of the angle.
First, locate the angle \(\frac{2\pi}{3}\) on the polar coordinate system. This angle is in the second quadrant, 120 degrees from the positive x-axis.
Since the radius is negative, move 2 units in the opposite direction of the angle \(\frac{2\pi}{3}\). This means you will move 2 units in the direction of the angle \(\frac{5\pi}{3}\) (or 300 degrees), which is directly opposite to \(\frac{2\pi}{3}\).
Plot the point at this location, which should be in the fourth quadrant, 2 units from the origin along the line of \(\frac{5\pi}{3}\).
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