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OpenStudy (anonymous):
Find the exact value of sin (7pi/8)
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OpenStudy (shamil98):
Consult the unit circle, or use a calculator.
OpenStudy (joannablackwelder):
I would use a reference angle and a double angle formula.
OpenStudy (joannablackwelder):
Sorry, half angle, not double angle formula.
OpenStudy (anonymous):
\[\sqrt{2-\sqrt{2}}/2\]
OpenStudy (anonymous):
is that right?
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OpenStudy (joannablackwelder):
That's what I get. Great job!
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