Convert the point to rectangular coordinates.
Table of contents
- 0. Review of College Algebra4h 43m
- 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
9. Polar Equations
Convert Points Between Polar and Rectangular Coordinates
Multiple Choice
Convert the point to polar coordinates.
(−1,−3)
A
(2,3π)
B
(2,67π)
C
(2,34π)
D
(−2,34π)
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Verified step by step guidance1
Identify the given Cartesian coordinates, which are (-1, -√3).
Use the formula for converting Cartesian coordinates to polar coordinates: r = √(x² + y²) and θ = arctan(y/x).
Calculate the radius r: r = √((-1)² + (-√3)²) = √(1 + 3) = √4 = 2.
Determine the angle θ: θ = arctan((-√3)/(-1)) = arctan(√3). Since the point is in the third quadrant, adjust the angle to θ = π + π/3 = 4π/3.
Combine the radius and angle to express the point in polar coordinates: (r, θ) = (2, 4π/3).
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