#1 01. 06. 2016 05:07
- stuart clark
- Příspěvky: 1015
- Reputace: 7
parabola and ellipse
Prove that the directrixes of two parabolas that can be drawn to have their foci at any given point 
of the ellipse
and to pass through its foci meet at angle which is equal to twice the eccentric angle of
(From plane Trigonometry Book: S.L Loney)
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#2 14. 03. 2018 04:35
Re: parabola and ellipse
Hi ↑ stuart clark:,
Look here
+of+the+ellipse++and+to+pass+through+its+foci+meet+at+angle+which+is+equal+to+twice+the+eccentric+angle+of+&source=bl&ots=LP2dRutMEt&sig=K4GQXdg6Ic0S3Uh4wVq1ixfYO2U&hl=fr&sa=X&ved=2ahUKEwi_irv97urZAhUGFywKHbRzDfMQ6AEwAnoECAgQAQ#v=onepage&q=Prove%20that%20the%20directrixes%20of%20two%20parabolas%20that%20can%20be%20drawn%20to%20have%20their%20foci%20at%20any%20given%20point%20%24P%24%20of%20the%20ellipse%20%20and%20to%20pass%20through%20its%20foci%20meet%20at%20angle%20which%20is%20equal%20to%20twice%20the%20eccentric%20angle%20of%20%24P%24&f=false">https://books.google.sk/books?id=-GygUT … mp;f=false
Srdecne Vanok
The respect, the politeness are essential qualities...and also the willingness.
Do not judge the other one.
Ak odpovedam na nejaku otazku. MOJ PRINCIP NIE JE DAT ODPOVED ALE UKAZAT AKO SA K ODPOVEDI DOSTAT
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