Rewrite the parametric equations in cartesian form x=3cos t, y=-sin t

Hello from MrBillDoesMath!

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

Discussion:

x = 3cost =>     x/3 = cost

                         y    = sint

Using  (sint)^2 + (cos)^2  =1 and substituting the above x and y values gives:

(x/3)^2 + y^2  = (cost)^2 + (sint)^2 = 1  or

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

Thank you,

MrB

step-by-step explanation: 4 cause 2+2=4

step-by-step explanation:

given that ab is divided into equal parts as

ac, cd, de, ef, fg, gh, hi, ib.

from this we find that f is the midpoint of ab.

so using mid point formula we find

f = (3,7)

similarly considering fb, we get

h = mid point of fb = ((6,6) and g, mid point of fh is

g = (9/2, 13/2)

i is mid point of hb

so i =(15/2,11/2)