dbaett9
dbaett9
25-07-2017
Mathematics
contestada
simplify sin(2x+7y)+sin(2x-7y)
Respuesta :
amirreza688
amirreza688
29-07-2017
sin(a+b)=sin a * cos b + sin b cos a
sin(a-b)=sin a * cos b - sin b cos a
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