Where do I go wrong ?
#Help with parametric equations
crisp lagoon
lucid spadeBOT
Where do I go wrong ?
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copper rivet
Where do I go wrong ?
Why do you think you did it wrong? The result is the same.
Though, better to avoid square roots in these cases.
vernal spade
Where do I go wrong ?
when u solved cos^2t=1-9x^2, why didnt you put + and -?
copper rivet
Yeah, that's kinda why square rooting isn't a particularly good idea.
vernal spade
Yeah, that's kinda why square rooting isn't a particularly good idea.
yea just like when u want to use the bisection formulas but cant cause there's a + and - lol
crisp lagoon
In previous examples we were shown (I think) we can get a cos from a sin by using (sin^2)+(cos^2)=1 and square rooting. Idk if we were shown this in the parametric equations chapter TBF. I used it before and it worked
Is it best to avoid doing that and square rooting in general in these types of questions due to gaining extra solutions that DNE?
copper rivet
Is it best to avoid doing that and square rooting in general in these types of q...
Well, not due to the latter, but rather due to potentially messing up the signs.
Basically, if you can stay rational, then better to do that.
crisp lagoon
Ah okay. Gotcha. Thanks mate
lapis auroraBOT
@crisp lagoon