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Mathematics 12 Online
OpenStudy (anonymous):

Use the half-angle formulas to evaluate each of the following: sin (15 degrees) and cos (112 degrees 30')

OpenStudy (isaiah.feynman):

I don't recall those formulas now.

OpenStudy (anonymous):

Yeah same here :(

OpenStudy (isaiah.feynman):

@dan815 Still recall!?

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