Engineering Board Exam Reviewer · Polar Coordinates · medium

Find the eccentricity of the conic r=6/2+ .

1. 1/3
2. 1/2
3. 2
4. 3

Answer

B. 1/2

Solution

Divide by 2: r=3/1+ 12 , so e= 12 (an ellipse).

More Polar Coordinates questions

1. Identify the conic r=3/1+ .
2. Find the distance between the polar points (3,30°) and (5,90°).
3. Convert the polar equation r=4 to rectangular form.
4. Convert the rectangular point (-3,3) to polar coordinates (r, ) with r>0 and 0°≤ <360°.
5. Convert the polar point (4,60°) to rectangular coordinates.
6. Find the point of intersection, with 0°< <90°, of the curves r=2 and r=4 .
7. Express the line x=4 in polar form.

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