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OpenStudy (anonymous):
FILL IN THE BLANK sin pi/3 __ pi/6= 1/2(sin pi/2+sin pi/6)
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OpenStudy (anonymous):
cos
OpenStudy (anonymous):
yup cos
OpenStudy (anonymous):
(sin x)(cos y) = 1/2[ (sin x-y) + (sin x+y)]
OpenStudy (anonymous):
thank you everyone :)
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