Given 4/ (-2 - cos(theta)) What is the distance between the pole and the directrix?
1 answer:
Answer:
the distance from pole to directrix is 4 units
Step-by-step explanation:
Rewritten to the form ...
r = ed/(1+e·cos(theta))
you find ..
ed = 4/-2 = -2 . . . . . where d is the distance from the pole to the directrix
e = -1/-2 = 1/2 . . . . . the eccentricity
so d = ed/e = -2/(1/2) = -4 and the ellipse has the equation ...
r = (1/2)(-4)/(1 + 1/2·cos(theta))
The directrix is a vertical line 4 units from the focus in the -x direction.
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Answer:
Image attached
Step-by-step explanation:
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Since the y-axis is the vertical axis and they ask to draw the points with a verical difference between them, we will draw the points in it.
Say the x-axis represents the sea surfice. The seagull would be over the sea, and the shark under the sea surfice (under x-axis).
This is the resulting drawing
