1. anonymous

What do you need help with?

2. anonymous

I don't not know how to answer question 7

3. anonymous

@seii

4. anonymous

number 6 isn't right

5. anonymous

what did i do wrong? @peachpi

6. anonymous

-120° is in the 3rd quadrant, both coordinates should be negative

7. anonymous

so would it be -1/2 and - $\sqrt{3}$ over 2

8. anonymous

Yes. For the other question, the coordinates would be the legs of a right triangle. The radius of the unit circle is 1, so if you get 1 for the hypotenuse the point lies on the unit circle. |dw:1437702750571:dw|

9. anonymous

the answer would be 1.32? @peachpi

10. anonymous

|dw:1437705549063:dw|