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OpenStudy (anonymous):
Write the expression as either the sine, cosine, or tangent of a single angle.
sine of pi divided by two times cosine of pi divided by seven plus cosine of pi divided by two times sine of pi divided by seven.
8 years ago
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OpenStudy (anonymous):
cos(pi/5)
cos(pi/7)
+sin(pi/5)
sin(pi/7)
8 years ago
OpenStudy (anonymous):
\[\sin (\Pi/2)\cos(\Pi/7)+\cos (\Pi/2)\sin(\Pi/7)\]
8 years ago
OpenStudy (anonymous):
thats the equation
8 years ago
OpenStudy (anonymous):
OH ok
8 years ago
OpenStudy (dayakar):
may be the above answer is wrong plz verify
8 years ago
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OpenStudy (anonymous):
what do you mean?
8 years ago
OpenStudy (phi):
I would use
sin(a+b)= sin(a) cos(b)+ cos(a) sin(b)
(but "backwards")
8 years ago
OpenStudy (anonymous):
how did you get that?
8 years ago
OpenStudy (anonymous):
Georgia your done
8 years ago
OpenStudy (dayakar):
\[\frac{ \sin \pi }{ 2\cos \frac{ \pi }{ ? }} + \frac{ \cos \pi }{ 2 \sin \frac{ \pi }{ 7 } }\]
8 years ago
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OpenStudy (anonymous):
No Hawaii we beat you 0 and 55
8 years ago
OpenStudy (anonymous):
i dont think youre doing the right thing @dayakar
8 years ago
OpenStudy (anonymous):
So shut up Hawaii
8 years ago
OpenStudy (dayakar):
ok, i;m sorry
8 years ago
OpenStudy (phi):
you should get
\[ \sin\left(\frac{\pi}{2}+\frac{\pi}{7}\right) = \sin\left(\frac{9\pi}{14}\right) \]
8 years ago
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OpenStudy (anonymous):
That's exactly what I got thank you @phi
8 years ago
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