Question

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

Answer 1

positive 4/5

This is because (-3/5)^2 + (4/5)^2 = 1
AND your "y" values have to be positive when your x values are negative to be in the second quadrant.

Answer 2

Because that is your second quadrant.

Answer 3

And the equation of your unit circle centered at the origin is:

x^2 + y^2 = 1 = 1^2

Answer 4

So, working with the unknown:

(-3/5)^2 + y^2 = 1 and then you solve for y.

You get a positive and negative value, but, again, you take the positive value.

Answer 5

Making sense to you?

Answer 6

@haleylou56 ?

Answer 7

yep thanks