Find the exact value by using a half-angle identity. sin (7π/8)

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Find the exact value by using a half-angle identity. sin (7π/8)

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

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Well I sure don't....
We don't tutor high levels anymore=[ And I've only finished precalc lol
@Hero thats why I called my hero.
Just pick an appropriate half angle identity and apply it to the problem.
Easier said than done.
Switch said and done
Or you could explain it to me.
I'm still waiting on OS to install a donate button for answering peoples questions
Are you familiar with these formulas? @AFleming42 http://www.freemathhelp.com/images/halfangles.png
sorry hate half angles
@saifoo.khan Have I seen them? Yes. Do I understand how the heck to use them? No....
I agree with AFleming42, same thing here (see them, maybe done them correctly)
The formula requires the values of angles divided by 2. See here:
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