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OpenStudy (anonymous):
find the exact value of: sin13pi/8
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OpenStudy (anonymous):
A) -sqrt2+sqrt2/4 B)sqrt2+sqrt2/4 C)-sqrt2-sqrt2/4 D)sqrt2-sqrt2/4
OpenStudy (anonymous):
13pi/8=2pi-3pi/8
OpenStudy (anonymous):
sin(13pi/8)=-sin(3pi/8)=-sqrt((1-cos(3pi/4))/2)
OpenStudy (anonymous):
which one do you think it is? a, b, c, or d?
OpenStudy (anonymous):
wait
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OpenStudy (anonymous):
ok :)
OpenStudy (anonymous):
\[-\sqrt{(2+\sqrt{2})/4}\]
OpenStudy (anonymous):
thank yoooooooouuuuuuuuu :)
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