Question

If the point P(-3/5y) lies on the unit circle and (P) is in the second quadrant, what does (y) equal?
HELP DX

Answer 1

unit circle points satisfy this relation:
\[\sqrt{x ^{2}+y ^{2}} =1\]
so: \[\sqrt{(3/5)^{2}+y ^{2}} = 1\]
solve this equation for y. You will get 2 values of y which are bouh correct

Answer 2

@jCortez93

Answer 3

if you have problem solving it, tell me

Answer 4

How do you solve it?

Answer 5

square bouth sides and you get:
\[3/5^{2}+y ^{2} =1\]
so:
\[y= \pm \sqrt{1-9/25}=\pm \sqrt{16/25} =\pm 4/5\]

Answer 6

got it?