## AFleming42 3 years ago Find the exact value by using a half-angle identity. sin (7π/8)

1. Lukecrayonz

@precal

2. Lukecrayonz

@Hero

3. Hero

@Lukecrayonz, you're the one who works for tutoring company.

4. AFleming42

Well I sure don't....

5. Lukecrayonz

We don't tutor high levels anymore=[ And I've only finished precalc lol

6. Lukecrayonz

@Hero thats why I called my hero.

7. Hero

Just pick an appropriate half angle identity and apply it to the problem.

8. AFleming42

Easier said than done.

9. Hero

Switch said and done

10. AFleming42

Or you could explain it to me.

11. Hero

I'm still waiting on OS to install a donate button for answering peoples questions

12. saifoo.khan

Are you familiar with these formulas? @AFleming42 http://www.freemathhelp.com/images/halfangles.png

13. precal

sorry hate half angles

14. AFleming42

@saifoo.khan Have I seen them? Yes. Do I understand how the heck to use them? No....

15. precal

I agree with AFleming42, same thing here (see them, maybe done them correctly)

16. saifoo.khan

The formula requires the values of angles divided by 2. See here: