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OpenStudy (anonymous):
Using the appropriate Double Angle Formula, simplify the expression: 2(sin25°)(cos25°)
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OpenStudy (raden):
use the identity : 2sin(x)cos(x) = sin(2x)
OpenStudy (anonymous):
The answer book says the answer is sin(50°). How?
OpenStudy (raden):
if u subtitute x=25 to formula above, giving us 2sin(25)cos(25) = sin(2*25) = sin(50), right ?
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