I made a thread last week where I had a reasonable idea what was going on in 2 problems last week
this week I have 2 problems where i have NO idea where to start.
Show that the ellipse x2 +2 y2 =2 and the hyperbola 2 x2 -
2 y2 =1 intersect at right angles.
What is the first time after 3 o'clock that the hands of the clock are together?
The Attempt at a Solution
1st problem, all I know is that perpendicular lines have similar slopes( dunno how to explain , for example 1 line has slope of 4 , perpendicular has to have a slope of -1/4).
but why does that matter? these are not lines so slopes shouldnt even matter at all, should I use implicit differentiation? even if I do, what for?
2nd problem, dunno how to start, cant even draw a diagram , t.t help!