He cartesian coordinates of a point are given. (a) (−9, 9) (i) find polar coordinates (r, θ) of the point, where r > 0 and 0
≤ θ < 2π.
1 answer:
Radius =
9^2 + 9^2 = d^2
d = sqrt(162), about 12.73
theta =
atan(9/-9)
is 45°, but in 2nd quad, so add 90
(12.727, 135°)
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