Question

Convert the following parametric equations into Cartesian equations.

x = cos2A
y = sin^2 A

Answer 1

not sure how to proceed with this
it might be useful to use the identity

cos 2A = 1 - 2 sin^A

Answer 2

no its cos 2A = 1 - 2 sin^2 A

Answer 3

so 1 - 2 sin^2 A = 1 - 2y
s0 x = 1 - 2y

Answer 4

Thanks for your help! I've just attempted using 1-2sin^2 A and i've come out with the answer:

(1-x)/2 = sin^2A

which makes sense as then I was able to replace y = sin^2 A with

y = (1-x)/2 <-- the answer.

Thanks again :)

Answer 5

in standard form thats
x + 2y = 1
right - good work