21OH!!! maine to socha tha ki hoga [17]
someone plz help me recollect how to do this damn sum. I've totally forgotten how to do it
1.Find the minor axis of:
2x2-2xy+4y2-(3+√2)=0
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UP 0 DOWN 0 0 5
5 Answers
62this is by rotation of axis...
this is definitely not in syllabus..
if you are giving jee try some other problems..
21DOUBT IN THE SAME TYPE : Can sum1 pl. give all the things v cud FInd frm a PARABOLA of the form :
ax2 + 2hxy + by2 + 2gx + 2fy + c = 0
I'll start wid 1
Vertex can be found out by Partial Differentiating the equation once w.r.t. x and once wid y
n simultaneously Solvin em to X and Y coordi of the Vertex ...........
Pl. isko aage badhao : Latus Rectum, Focus, Directrix wud b Helpful ........
11tapan bhai
IIT meinsirf lines and circles ka coordinate shift karna hi hai
u should recognize the curves .
1i'm giving jee, bhaiya
this question was in a FIITJEE test.(i'm a fiitjeeian) We've been taught this rotation concept, but I can't remember anything now.
What's wrong with my approach:
i got the angle of rotation as 22.5°. So, eq'n of ellipse in non rotated system should be given by replacing x by (xcosθ-ysinθ) and y by(xcosθ+ysinθ). But this way, the xy doesn't seem to cancel out . Please help.