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OpenStudy (anonymous):
Find an exact value. cos 75°
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OpenStudy (anonymous):
OpenStudy (raden):
75 = 30 + 45 then use the formula : cos(a+b) = cos(a)cos*b) - sin(a)sin(b) here a = 30 and b = 45
OpenStudy (anonymous):
so it would be A?
OpenStudy (anonymous):
I mean D @RadEn
OpenStudy (anonymous):
@RadEn
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