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OpenStudy (anonymous):
anyone know the answer to this? use sum and difference identities to simplify this expression. sin75cos25-cos75sin25
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geerky42 (geerky42):
HINT: sin (α − β) = sin α cos β − cos α sin β
OpenStudy (anonymous):
so sin50?
geerky42 (geerky42):
yup
OpenStudy (anonymous):
thank you
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