Question

Eliminate the parameter.

x = 3 cos t, y = 3 sin t
im so confused, can someone please explain and tell me the steps

Answer 1

can you show me the work? i dont really understand what you mean. I have the answer, I just dont understand how to solve it @mayankdevnani

Answer 2

yes

Answer 3

@mayankdevnani

Answer 4

did you write something?.. @mayankdevnani

Answer 5

@wade123 just divide both equationss because to cancel out 3:-
we get,
\[\huge \sf \frac{x}{y}=\frac{3cost}{3sint}=tant\]
finally we get,
\[\huge \sf x=y~tant\]

Answer 6

understood? @wade123

Answer 7

you said something before about equaling it to t.. @mayankdevnani

Answer 8

noo...just forgot my comment and just concentrate in my new comment and if you have any problem regarding my new comment,please reply

Answer 9

what is tant... @mayankdevnani

Answer 10

@ganeshie8 please help!

Answer 11

\[\huge \sf tant=\frac{sint}{cost}\]

Answer 12

its wrong.......its \[\huge \sf \cot t\]

Answer 13

this is tricky, `t` is still there, try this may be

x = 3 cos t, y = 3 sin t

x^2 = 9 cos^2t
y^2 = 9 sin^2t
--------------------
x^2 + y^2 = 9(sin^2t + cos^2t)

Answer 14

recall the identity : sin^2t + cos^2t=1

x^2 + y^2 = 9(1)
x^2 + y^2 = 9

this is just a circle !

Answer 15

@ganeshie8 what about my answer??

Answer 16

see if that makes more or less sense..

Answer 17

which answer ?

Answer 18

\[\huge \sf x=y \cot t\]

Answer 19

`t` still exists right ?

Answer 20

in the final equation, `t` should not be present...

Answer 21

ohhh