How do you convert $(18, - 7)$ $(18,-7)$ into polar coordinates?

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Answer 1 · 2016-10-27T12:14:39

Cartesinan: $(x, y) = 18, - 7) \to$ $(x,y)=18,-7) rarr$ Polar: $(r, θ) = (19.31, - 0.37)$ $(r,theta)=(19.31,-0.37)$
$θ$ $theta$ given rn *radians#

$radius = \sqrt{18^{2} + {(- 7)}^{2}} \approx 19.31321$ $"radius" = sqrt(18^2+(-7)^2) ~~19.31321$ (using a calculator)

$θ = arctan (- \frac{7}{18}) \approx - 0.37089$ $theta = "arctan"(-7/18) ~~-0.37089$ (again with teh calculator)

How do you convert (18,-7)(18,−7)(18,-7) into polar coordinates?