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Which set of rectangular coordinates describes the same location as the polar coordinates (-2, 2pi) A. (0,2) B. (-2,0) C. (2,0) D. (0,-2)
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Which set of rectangular coordinates describes the same location as the polar coordinates (-2, 2pi) A. (0,2) B. (-2,0) C. (2,0) D. (0,-2)
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Jan 19, 2019
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Which set of rectangular coordinates describes the same location as the polar coordinates (-2, 2pi)
A. (0,2)
B. (-2,0)
C. (2,0)
D. (0,-2)
Mathematics
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Dagvl
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Dagvl
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To answer this question you should know what to do to change the polar coordinates to rectangular ones: x = rcos (θ)
y = rsen (θ)
So for r = -2 and θ = 2π we have
x = -2cos (2π)
x = -2
y = -2sen (2π)
y = 0
Finally the equivalent point in Cartesian coordinates is the point:
(-2 0)
The correct answer is option B
JP Hellemons
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Jan 25, 2019
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JP Hellemons
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