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anonymous
 one year ago
I need help on a precalc question, medal and fan:
Find an equation in standard form for the ellipse with the vertical major axis of length 18, and minor axis of length 6.
Please just walk me through it so I know how to do it.
anonymous
 one year ago
I need help on a precalc question, medal and fan: Find an equation in standard form for the ellipse with the vertical major axis of length 18, and minor axis of length 6. Please just walk me through it so I know how to do it.

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.0@ganeshie8 can you get someone on here to help me?

phi
 one year ago
Best ResponseYou've already chosen the best response.0do you know the generic equation for an ellipse?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0x^2/a^2 + y^2/b^2 = 1

phi
 one year ago
Best ResponseYou've already chosen the best response.0ok, and generally the a is the semi majordiameter (1/2 of the longer diameter) if the y direction is longer, you put the a^2 underneath the y

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0ok so now what values do I have to plug in?

phi
 one year ago
Best ResponseYou've already chosen the best response.0vertical major axis of length 18, that is telling you the y direction is the major axis the 18 is the entire height of the ellipse. you want 1/2 of that for "a"

phi
 one year ago
Best ResponseYou've already chosen the best response.0minor axis of length 6 that is the width of the ellipse. you want 1/2 of that for b

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0so 9^2 =81 y^2/81 + x^2/b^2 = 1

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0so now what about b?

phi
 one year ago
Best ResponseYou've already chosen the best response.0I posted about "b" up above.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0oh lol sorry, so 3^2 = 9 y^2/81 + x^2/9 = 1?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0can you help with another?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0@ phi ? Find all polar coordinates of point P where P = (5,pi/6)
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