Question

Determine two pairs of polar coordinates for the point (2, -2) with 0° ≤ θ < 360°.

Answer 1

x = rcos theta = 2
y = r sin theta = -2
x^2 + y^2 = r^2 ---> r^2 = 8 ---> r = sqr (8) = 2sqr(2)
now back to x = rcos theta = 2sqr(2)cos theta= 2----> cos theta = 1/sqr (2) ---> theta = pi/ 4
you have r, theta, plug into formula to get
x = 2sqr(2) cos (pi/4)
y = 2sqr(2) sin (pi/4)
DONE

Answer 2

wait.. so whats the answer? im sorry

Answer 3

the last 2 sentences

Answer 4

the answer choices are;
(2√2, 225degree), -2√2, 45deg)
(2√2, 135degree), -2√2, 315deg)
(2√2, 315degree), -2√2, 135deg)
(2√2, 45degree), -2√2, 225deg)

Answer 5

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