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OpenStudy (anonymous):
simplify expression using half angle or double angle formula. (sin 6degree) / (1+cos 6degree)
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OpenStudy (anonymous):
sin6 = 2 sin3 cos 3 1 + cos 6 = 2 cos^2 3 Plug in.
OpenStudy (anonymous):
2 sin3 cos 3/2cos^2 3 = sin3 /cos3 = tan3
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